The vision of the Bauhaus of the Seas Sails is to demonstrate and achieve solutions for climate neutrality with a particular focus on coastal cities as an interface to healthy seas, ocean and water bodies envisioning a new triangle of sustainability, inclusion, and design focused on the most important global natural space – our water bodies.
Bauhaus of the Seas Sails will offer opportunities to engage with communities for an environmentally sustainable, socially fair, and aesthetically appealing transition.
Currently, seven cities, located in four different regions and aquatic ecosystems in Portugal (estuary), Italy (lagoon and gulf), Sweden/Germany (strait/river), and the Netherlands/Belgium (delta) have committed to the Bauhaus of the Seas network supporting mission-oriented pilots of the New European Bauhaus and showcase innovative solutions.
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Michael Rodrigues led this platform's development, creating its core architecture. The front-end development was a collaborative effort, with contributions from Alankrita Sarkar, Alberto Grassetti, Carola Hein, Christoph Strupp, Ingrid Mulder, Léa Kayrouz, Lukas Höller, Maëlle Salzinger, Silvia Sivo and Yvonne van Mil.
Future Tidal Architectures, in collaboration with Deltametropool and the Next Generation initiative, engages young architects and spatial designers to envision urban futures in response to sea-level rise and changing water patterns.
Coastal areas, deltas, and wetlands—home to large populations and vital infrastructures—are especially vulnerable to climate change. These regions integrate complex social structures, ports, and heritage sites, requiring innovative and adaptive design strategies.
This initiative fosters collaboration among stakeholders, including port authorities, governments, citizens, and NGOs. Through co-design, design competitions, and open planning, it seeks to balance urban, social, and ecological interests in transforming landscapes.
This project, inspired by Alex Jordan's research at the Max Planck Institute of Animal Behaviour, aims to regenerate an artificial reef, replacing a removed natural reef for a shipping channel. The removal caused coastline erosion and reduced both human and wildlife presence.
A sustainable underwater construction toolkit will be developed, guided by scientific research and marine behavior. Local contacts will be trained to use measurement tools for ongoing progress monitoring.
Historical environmental data and community interactions will be mapped to establish a baseline for assessment. The project will also propose strategies that balance habitat regeneration with human activities.
Blue Makerspaces expand on the Algae Platform concept, originally developed by Atelier Luma. They collaborate with specialists to explore material applications and production possibilities, integrating sea-based resources like algae, salt, and shells into urban environments.
Applications include façade tiling, public furniture, and product design. The Blue Maker Space functions as a design research hub and knowledge-sharing program, promoting non-extractive water-based materials in design, textiles, architecture, and agro-food industries.
The initiative aims to create a maker space that blends culture, critical thinking, and entrepreneurship with sustainable technologies, supporting the blue economy.
Regenerative menus adapt food landscapes to align with human-made climates. Inspired by the Climavore concept by Cooking Sections, this approach explores how food production and consumption can respond to climate changes through co-design with local communities.
Unlike traditional dietary categories, Climavore considers how ingredients influence spatial and infrastructural responses to environmental changes. It encourages flexible eating habits, such as using drought-resistant crops during water shortages or filter feeders in polluted waters.
These menus will be tested in schools and cultural institutions as pilot projects, showcasing sustainable food adaptation strategies in response to climate challenges.
Seniors are a vital part of the community, carrying traditions, experience, and knowledge. However, they also face unique challenges such as reduced mobility, home safety concerns, health issues, and loneliness.
This initiative focuses on the silver economy and promotes spatial and cultural justice. It adapts to seniors' physical and cognitive limitations, addressing accessibility in coastal cities and islands.
The project explores interactive design as a tool for improving senior living conditions. It involves seniors in the design and evaluation of platforms and tools developed in workshops.
With an inclusive and intergenerational approach, it connects seniors, families, social services, designers, and entrepreneurs, making the solutions applicable to broader contexts.
Inspired by the Zoöp concept—defined as BoS-zoöp and developed by BoSS partner HNI alongside consortium members—this initiative advances knowledge on ecological regeneration and governance through local pilots.
Zoöp is an organizational model fostering cooperation between human and nonhuman life, ensuring that nonhuman interests are represented in decision-making.
Multispecies Assemblies will engage citizens and stakeholders in addressing systemic climate justice issues, co-creating and sharing data, and enhancing climate resilience through citizen science, social dialogue, and innovation.
Developed from the MEMEX project (IIT & IST-ID), this initiative addresses cultural exclusion among displaced communities facing forced assimilation and social stratification.
It leverages a geolocalized digital storytelling platform powered by AI and AR to foster social inclusion and cultural participation.
Using digital storytelling as a co-design strategy, the project facilitates intercultural dialogue and community building, amplifying marginalized voices, including non-human perspectives.
Stories, gathered through citizen participation, track ongoing changes and promote cultural heritage as a tool for economic growth, social cohesion, and environmental sustainability.
Ultimately, this initiative transforms storytelling into a bridge for empathy and engagement among multicultural communities.
Developed from Escola Azul, the Eco-Schools Network, and FamStudio's expertise, this initiative educates future generations on ocean sustainability.
Ocean Literacy uses play-led, project-based learning to help children explore the natural world. By collaborating with research teams and partners across sectors, it anticipates future challenges affecting children and their families.
Insights are turned into actions and products through industry partnerships. Families play a key role in the design process, empowering children to reach their potential and contribute to a more sustainable future.
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Thank you to Silvia Sivo for her work on this section. She is a PhD researcher at Iuav University of Venice and a guest researcher at the Delft University of Technology. She focuses on the governance of spaces of interaction between port and city in a water-based relational perspective, using Venice as a case study.
Due to its history of maritime power, Venice is commonly called ‘mistress of the sea’. Venice's first settlement on the Riva Alta (Rialto) dates back to 25 March 421, when Venice was still a collection of small settlements in the lagoon, subsisting on fishing and the exploitation of the salt pans. From the 5th century onwards, following waves of invasions from the Huns and Lombards, the inhabitants and the institutions’ headquarters of the mainland sought refuge in the lagoons. This led to a growing interest in maritime activities and trade along with government autonomy from the central administration.
From the 9th century, the relocation of the ducal seat to the Realtine islands (between Rialto and San Marco) led to an intensification of settlements in the area. Venice then developed over a 100 and more islands, growing into a city thanks to its strategic location between the mainland and the sea and protected by the lagoon, where ships could find refuge and mooring. In this way Venice became a hub for trade between Europe and the Middle East and the inland routes toward Central Europe. It became the starting point for a maritime power that ruled over a vast coastal territory including the Dalmatian coastline and Greek islands of Crete and Cyprus, opposing the Ottoman Empire for control over the Mediterranean for a long time (Cosgrove & Foot, 2024).
de' Barbari, J. (1500). Venetie MD - View of Venice, 1498-1500. Museo Civico Correr.
For the Republic of Venice, also known as Serenissima, whose dominance over the Adriatic was such that the Venetians referred to it as the “Gulf of Venice”, port activities were the fundamental asset. Venice hosted an Arsenale (shipyard and storage for the fleet of the republic) and the fondaci (buildings used by foreign merchant communities as hotels, warehouse, embassy and trade headquarters). They were important drivers of the city’s prosperity, and maritime economy but also its influence on arts and culture. Over the centuries, the port activities, needing more space and functionally specialised areas, moved from the waterfront towards a peripheral area west of the island, leading to the set up of the maritime station and a first industrial cluster. Despite Venice's declining importance in maritime traffic, new infrastructural interventions on land (construction of the railway bridge in 1846) and at sea (creation of breakwater dams at the lagoon’s portsmouths and the deepening of the canals) increased the arrival of larger ships and connections with the region (Cosgrove & Foot, 2024).
In 1917, the first industrial – metallurgical and then petrochemical – hub over the reclamation of the “barene” brackish marshlands was developed along the lagoon coastline. Porto Marghera grew from this area, also hosting relocated commercial port activities from the Maritime Station over the decades. Industrial port areas further expanded with the San Leonardo oil port (1966) which caused the loss of vast natural areas. It also led to the relocation of the port workers’ families into the neighbouring town, leading to a social detachment from the city.
Ryckaert, M. (2014). Venice (Italy): Harbour and industrial zone of Marghera.
The increasing port activities, the evolution of naval technologies and above all the increasing size of ships led to the deepening of the canals used as waterways within the lagoon, and to the dredging of the Vittorio Emanuele canal (1920s) and Malamocco-Marghera canal (operating from 1970). The digging of these canals, to allow oil tankers to reach petrochemical refineries in Marghera, led to changes in the hydrodynamics of the lagoon (Sfriso & al., 2023). The canals became a preferred route for the propagation of the tide and one of the principal causes for land erosion. These environmental risks, together with some ship accidents in the Canale della Giudecca, sparked local protests and social movements. This led to the perception of a growing disconnect between the port on the one hand, and the city and the lagoon territory on the other hand.
Descouens, D. (2019). The Porto di Lido-San Nicolò and the Lagoon of Venice.
Venice is a regional capital city and a metropolitan city, and one of the major tourist destinations in Italy and Europe, hosting over 5 million tourist arrivals in 2023, based on data from the Statistical Office of Veneto Region (Bettiol & Marini, 2023). Venice is known for its cultural and architectural heritage, art exhibitions and events, universities and research centres. The port remains a key economic asset for the entire region and satellite sectors.
The population of the city has kept decreasing from the 1970s, due to declining birth rates and an ageing population, but also the loss of public services for residents which pushes them to move to inland municipalities. However, the migration rate is positive and the city hosts several national communities (among them the most numerous are from Bangladesh, Romania and China).
Venice faces problems of over tourism and gentrification, with a huge crisis of housing shortage for both residents and students, and of water transportation management (overcrowding, insufficient services for residents, poor safety). There are important contradictions between promises for social housing and public facilities by public authorities, and ongoing projects for luxury hotels as well as tourist accommodations being allowed in student residences (Sgreccia, 2024).
The Port of Venice is a multipurpose seaport, hosting a logistics centre and agribusiness, cargo, steel, petrochemical and fishery functions, together with other maritime-related activities like shipbuildings and commodity trading. Within the industrial and commercial port, several business companies have private docks.
From 2021, due to the ban of transit for big ships, short term measures were taken (e.g., temporary mooring points) while in the mid-long term a new set up of the port is envisioned, with the North Canal and Passenger Station moorings (Commissioner for Cruises in Venice, 2024; UNESCO, 2021). This strategy of the spread port within the lagoon is accompanied by the project of an off-shore cruise and commercial port.
The port is also implementing plans for energy transition and environmental sustainability, with the realisation of a Hydrogen District in Porto Marghera and cold ironing power supply for reducing shipping emissions. On Venice island, a waterfront renovation project is aimed to foster the relationship with the city, through the coexistence of port functions and urban activities, as shown on the website of the Port Authority of Venice and Chioggia.
Nevertheless, local citizens' organisations continue to stress the preference of business activities over services for citizens and the balance of the lagoon ecosystem (Institute of Radical Imagination, 2024). Big cruise ships are particularly contested, with urban social movements, independent research groups and international support networks pushing for a reduction in shipping tourism pressure and a halt to invasive dredging activities for enhancing big ships' access to the lagoon.
Venice’s past and present of water management, linked both to the maritime heritage and to urban and regional development, shape the city’s landscape and identity. During the Venetian Republic (697–1797), the “Magistrato alle Acque” was a technical body in charge of the management of all aspects related to water, from environment to fishing to waterways, this political and administrative form of government reflected the importance attributed to life on the water and the balance between the dynamics of the lagoon and the survival of human settlement (Atlante della laguna, 2015). The aphorism 'great lagoon makes great port' – Gran laguna fa gran porto – is exemplary of this approach to water governance.
The water heritage is still visible with some infrastructures – the Murazzi breakwaters, huge stonewalls protecting the Lido coastline from the sea, or the Cippi di conterminazione lagunare, system for marking the lagoon boundary and then the territorial limits of regulation enforcement (Atlante della laguna, 2015). Significant architecture heritage sites include the Arsenale, the former complex of shipyards and workshops currently used as Navy headquarters and exhibition centre, and the Fondaci, currently hosting museums and luxury shopping centres (although the Fondaco dei Tedeschi store is set to close in 2025) (Moodie, 2024).
Maritime mindset is also still present in intangible cultural heritage that constitutes the social glue of local civil and religious celebrations: among the most famous are the Festa della Sensa, the feast of the Ascension, where every year, along with the Catholic holiday, the mystical union between Venice and the sea is celebrated; the Festa del Redentore, the commemoration of the liberation from the plague epidemic in 1577 celebrated with a big fireworks display on the water, convivial gatherings on boats and along the canals and banks. Moreover, several times a year, historical regatta and rowing competitions have also become international attractions, along with the more well known carnival period and Biennale events – like the Mostra del Cinema, Biennale of Architecture and Art.
Venice’s maritime identity, which is also evident in paintings by some of the world's greatest artists such as Giorgione, Titian, Tintoretto, Veronese and others, and in museum collections like the Naval Museum. The bonds between the city, the lagoon and the ocean are celebrated in different ways, notably with the historic regatta, a yearly event that features a parade of traditional boats along the Grand Canal and rowing races in the neighbourhoods of Venice. However, the port is generally not mentioned in these events and there is a sense that the port has become detached from urban culture in Venice. To recall the port's role in Venice’s identity and the mutual relationship between city and the port, the Port Authority enacted initiatives using digital tools and promoting events for fostering dialogue with the local community, as displayed on the Port Authority website.
Living with water has been compromised by health and safety threats – as an example, the especially childrens’ habit of swimming into the city’s canals is no longer possible. Still Venice’s residents resist by maintaining various types of relationships with the water, through boating, water sports, bathing in parts of the lagoon, and activating citizens-led initiatives and independent research projects in the islands and the lagoon (see Lido di oggi lido di allora, 2015; We are here Venice website) For instance, there are efforts linked to conviviality and the investigation of human and non-human relationships through food (Kent, 2022).
Venice and its lagoon is a UNESCO World Heritage site, encompassing the entire lagoon and a buffer of mainland (70,176.4 hectares) including natural and built goods. One of the main purposes of the Heritage site is to enhance the city of Venice, the island and mainland coastline settlements and promote their harmonious coexistence with the lagoon ecosystem.
In the description of the UNESCO Heritage site, “The occurrence of exceptional high waters poses a significant threat to the protection and integrity of Venice lagoon and historic settlements”.
The increasing Acqua Alta events (in 1966, 2008, 2018 and 2019) due to a changing climate and to the lagoon hydrology alterations caused by the aggressive canal dredging in the 20th century, have raised the need for adaptation measures (Tagliapietra, 2011; IPCC, 2022). The MoSE was built from 2003 onwards and first activated in 2020, but other environmental protection works have not yet been carried out. A comprehensive and effective strategy is lacking to govern the high risk of flooding, restore the barene and protect the transitional water ecosystem.
Being built on water, the city of Venice is exposed to Cross-Media Effects (subsidence, eustatism and wave motion due to high-speed boats) that pose risks for building foundations. Moreover, “sea level rise, especially when accelerated locally by subsidence, is causing increasingly severe and widespread coastal erosion, beach retreat and marine flooding with very significant environmental and socio-economic impacts on coastal populations" (Anzidei et al., 2024).
The city of Venice has adopted various Water Plans for hydraulic safety, while the Port of Venice is enacting climate policies to mitigate the CO2 emissions, for example by signing the Blue Flag 2024 voluntary agreement as stated on the Port Authority website (2024). However, the issue of cleanup of land and water from pollution linked to port-related industrial activities is still to be tackled.
The Venice lagoon is a unique environment characterised by instability, the influence of the tide, brackish waters and erosion from wave motions and coastal currents, as described on the Images of Venice website. The area, with its environment of dunes and wooded areas on the coast, has a rich biodiversity with birds (Black-winged Stilt, the Redshank, etc.) in the salt marshes and brackish water wetlands, reedbeds and of course fish. Typical fish in the area include the Mediterranean Killifish, Adriatic lagoon Goby and Black-spotted Goby. The transitional waters of the lagoon also provide habitat for migrant species like the European flounder, as stated on the Life Lagoon Refresh website.
However there has been major biodiversity loss in the process of engineering water, especially caused by the dredging and rectification of the canals, and building of industrial docks by reclaiming the barene (from the Venetian dialect: “baro” meaning bush or fallow, typical lagoon islands covered in vegetation that form the foundation on which Venice was built). In the past century, some 70% of the original barene has disappeared and the average water depth has tripled. According to the Lazzaretti Veneziani project, the barene serves as an “important litmus test of the relationship between man and nature” and its loss has ecological, economic and cultural impacts, including on the inhabitants emotions and sense of identity. Moreover, the natural wetlands and portsmouth brackish water mix caused by the exchange of fresh and sea water are also highly altered by the MoSE dams, leading to changes in the marine species life. Industrial activities, large-scale fishing and aquaculture also impact the lagoon ecosystem, as explained on the Images of Venice website.
The process of human alteration caused by the water management of the Serenissima period, through the uses for aquaculture (valli da pesca), and water separation plans - embankments at the lagoon limit and river diversions on the mainland from the XIV century onwards, accelerated considerably from the second half of the 19th century onwards, to facilitate the passage of large ships, dramatically reducing the biodiversity-rich intertidal zones.
This along with intense urbanisation of the lagoon area, increased maritime transport and infrastructure have put a heavy pressure on marine and coastal ecosystems like fish, plants, migratory birds, etc. Human interventions have also turned the Venice lagoon into a hotspot for non-native invasive species like macroalgae and blue crabs, with the latter negatively affecting native fish species (Marchini et al., 2015; Sfriso & al., 2023).
In order to address these issues in a comprehensive way, and beside the institution of protected areas, a special law for the lagoon has been established, which must nevertheless still be implemented, as stated on the website of the Venice project.
History
Society & Economy
Port Today
Culture & Heritage
Climate Change
Biodiversity & Water Ecosystems
Lisbon's history as a port city dates back to Phoenician times, making it over 3,000 years old, and was further solidified under Roman rule (Filipe, 2021).
Phoenician archaeological dig in a cloister of the Lisbon Cathedral. Szilas. (2006, January). Archeological excavations at the Sé Cathedral. CC0, Wikimedia Commons.
The Moorish conquest in the 8th century brought significant cultural and architectural influences, shaping the city's identity. The Reconquista in the 12th century marked a turning point, leading to Portuguese control and the city's rise as a major maritime centre during the early 15th century through the 17th century. The 18th-century earthquake devastated Lisbon, but the Marquis of Pombal's reconstruction efforts led to significant urban renewal (Câmara et al., 2009).
The oldest known panorama of Lisbon (1500–1510) from the Crónica de Dom Afonso Henriques by Duarte Galvão (1435-1517). Public Domain, Wikimedia Commons.
Political upheavals in the 19th and 20th centuries, including the establishment of the Portuguese Republic and the Carnation Revolution, shaped the country's trajectory. Portugal's accession to the EEC and Expo '98 catalysed economic growth and modernization, transforming Lisbon into a vibrant European capital (Weeks, 2018).
The Parque das Nações district was initially built for the Lisbon World Expo. Lucas. (2013). CC BY 2.0., Wikimedia Commons.
Lisbon, a city with a population of around 544,000, is part of a larger metropolitan area housing over 2.8 million residents (Ribeiro et al., 2022). This dense urban environment presents challenges related to quality of life and resource allocation. The city's diverse population includes a significant number of migrants, contributing to its rich cultural landscape. Lisbon's growing popularity as a destination for digital nomads and retirees, coupled with its historical significance and vibrant culture, has attracted international visitors and investment (Andrade, 2023). While the city's economy is driven by services, tourism, and technology, rising housing costs pose challenges for local residents (Cocola‐Gant & Gago, 2019).
Lisbon, a city steeped in history and culture, is renowned for its maritime heritage and architecture. Its rich past as a centre for maritime exploration is reflected in landmarks like the Belém Tower and the Monument to the Discoveries (Medeiros et al., 2021).
The Belém Tower, one of the most famous and visited landmarks in Lisbon. Alvesgaspar. (2009). CC BY-SA 3.0, Wikimedia Commons.
Lisbon's architectural diversity, ranging from Gothic to Pombaline styles, is prominently displayed in iconic sites such as the Jerónimos Monastery and São Jorge Castle, both of which reflect the city’s rich historical narrative and artistic heritage (Redweik et al. 2020). The Jerónimos Monastery, a UNESCO World Heritage Site, exemplifies Manueline architecture, while São Jorge Castle offers a glimpse into the city's medieval past (Calvo, 2015). Lisbon is also the birthplace of Fado, a soulful musical tradition deeply embedded in Portuguese culture (Carvalho et al., 2023). Its cuisine, centered around seafood, reflects the country's maritime heritage. The city's vibrant festivals, traditional crafts, and artistic legacy, including the influence of poets like Fernando Pessoa, contribute to its captivating cultural identity.
Deensel. (2017). The 25 de Abril Bridge crosses the Tagus River from Alcântara to Almada. CC BY 2.0, Wikimedia Commons.
Lisbon, like many coastal cities, is increasingly vulnerable to climate change, facing challenges such as rising temperatures, water scarcity, and sea-level rise. The city has been identified as a climate change hotspot, particularly susceptible to extreme heat events that significantly impact public health and infrastructure (Nogueira & Soares, 2019). To combat these challenges, Lisbon is implementing proactive measures, including enhancing green spaces and improving water efficiency through strategic planning (Matos, 2024). These initiatives are crucial for adapting urban infrastructure to mitigate climate-related impacts, as urban areas are particularly at risk due to their geographical locations (Silva & Costa, 2017).
Lisbon's ecosystems, shaped by its Mediterranean climate and the Tagus Estuary, are critical for biodiversity, particularly as a stopover for migratory birds. The Tagus Estuary supports diverse marine life and is essential for migratory shorebirds, which rely on its rich feeding grounds during migration (Catry et al., 2022). However, human activities, such as pollution and habitat degradation, threaten these ecosystems (Catry et al., 2011).
To address these challenges, Lisbon has implemented measures to restore wetlands, manage invasive species, and protect natural areas. By promoting sustainable practices and environmental conservation, the city aims to preserve its valuable biodiversity and ensure the long-term health of its ecosystems.
Tagus Estuary. (Patmar 24, 2018). CC BY-SA 4.0.
Oeiras, a municipality with a rich historical tapestry, has transitioned from its origins as prehistoric settlement to a modern urban center (Cardoso, 2011). Its agricultural roots were prominent during the Middle Ages, serving as a vital agricultural hub and a strategic coastal defense point, which facilitated trade and military logistics. The 18th century marked a significant transformation under the Marquês de Pombal, who implemented reforms that spurred urban development and infrastructure improvements, including the establishment of educational institutions (Almeida et al., 2020). The arrival of the railway in the 19th century further catalyzed Oeiras' evolution into a favored recreational destination for Lisbon's elite, enhancing its socio-economic profile. Today, Oeiras is recognized for its high quality of life, economic dynamism, and preservation of historical landmarks.
The gardens of the Royal Palace of Caxias. Applefogia. (2011). CC BY-SA 3.0, Wikimedia Commons.
Oeiras, with a population of around 175,000 residents, is one of the most densely populated municipalities in Portugal. It is particularly known for its high standard of living and vibrant economy. With a highly educated population and a strong focus on technology and innovation, Oeiras has become a significant business and tech hub, attracting major companies and fostering a thriving entrepreneurial ecosystem (Bravo, 2018). The municipality's economic prosperity, combined with its quality of life, makes it an attractive destination for both residents and businesses (Morgado, 2023).
Threeohsix. (2019). Congress Center of Taguspark. CC BY-SA 4.0, Wikimedia Commons.
Oeiras, a town rich in cultural and historical heritage, is home to significant landmarks such as the Palácio Marquês de Pombal and the Forte de São Julião da Barra. The Palácio, an 18th-century architectural marvel, reflects the influence of the Marquês de Pombal, who was pivotal in educational reforms and urban development during his time. Additionally, the Forte de São Julião da Barra serves as a testament to the town's strategic military history (Cardoso, 2011). The architectural landscape of Oeiras is further enhanced by its intricate tilework and the Aqueduct of Oeiras, which showcases the town's engineering prowess. Oeiras is also celebrated for its traditional Carcavelos wine, contributing to its coastal charm and making it a favored destination for visitors seeking both cultural enrichment and leisure.
Pereira, J. (2007). Forte de São Julião da Barra. CC BY-SA 3.0, Wikimedia Commons.
Oeiras, like many coastal regions, faces significant vulnerabilities due to climate change, particularly concerning heatwaves, droughts, and sea-level rise. The impacts of these changes threaten not only the local population but also the tourism sector, which is vital for the region's economy. Research indicates that coastal tourism is particularly susceptible to climate-related disruptions, with rising sea levels posing a direct threat to beach accessibility and coastal infrastructure (Hyman, 2013). Moreover, the Portuguese coastline, where Oeiras is located, is among the most vulnerable in Europe, with approximately 70% of the population residing in coastal areas (Proença et al., 2023). The combination of increased flooding and erosion due to sea-level rise exacerbates these vulnerabilities, necessitating urgent adaptation strategies to protect both residents and tourism assets (Reimann et al., 2018; Cin et al., 2020). Without effective mitigation measures, the risks to Oeiras's coastal infrastructure and tourism could lead to significant economic and social challenges (Cin et al., 2020).
Oeiras is characterized by a rich biodiversity that includes various plant and animal species, particularly in its coastal and estuarine ecosystems. The Tagus estuary serves as a crucial habitat for diverse marine life, influenced by both tidal movements and freshwater discharges, which create unique ecological conditions (Vaz & Dias, 2014; Vaz et al., 2019). However, the region faces significant threats from invasive species, notably the Chinese mitten crab, which has established a population in the estuary since the late 1980s and poses risks to local biodiversity and ecosystem stability (Wojcik et al., 2014; Anastácio et al., 2018). Furthermore, the coastal areas of Oeiras, with their sandy beaches and rocky shores, contribute to the ecological richness of the region, but they are also vulnerable to human activities and environmental changes, necessitating effective conservation strategies to maintain ecological balance and protect natural resources (Vaz et al., 2019; Guerreiro et al., 2015).
Thank you to Alberto Grassetti for his work on this section. He is an architect, engineer and PhD candidate. Grassetti is currently conducting a doctoral research funded by the Department of Architecture of the University of Bologna and the Renzo Piano Foundation entitled “The redevelopment of the Old Port of Genoa. Projects, archive, future prospects”. Currently, Grassetti is a visiting researcher at the Department of Architecture of the Delft University of Technology.
The first signs of settlement in the Genoese territory date back to the 5th-4th century b.c. Etruscan populations initially settled on the Castello hill and in the port area of Mandraccio (Barbieri, 1938). The ancient settlement of Genoa fell under Roman control and remained so until the fall of the Roman Empire. Only from the 11th century did the city manage to gain independence, first as a Commune and later as a Maritime Republic governed by merchant guilds. Between the 14th and 16th centuries, control of the city of Genoa passed to the Doges, and the city experienced a period of great financial power. Genoa managed to acquire control of various colonies in the Mediterranean basin and became the financial center of the Kingdom of Spain (Braudel, 1977; Braudel, 1989).
Grasso, C. (1597). View of Genoa in 1481. Wikimedia Commons.
Genoa lost its independence due to the expansionist ambitions of the Kingdom of Sardinia, which would eventually become the Kingdom of Italy (1861). During this period, Genoa became the main port of the kingdom, as part of the industrial triangle formed between Milan, Turin, and Genoa. In the 1930s, during the Fascist period, "Greater Genoa" was created through the annexation of various neighboring municipalities giving birth to the current municipal administration (Sirolli & Poggi, 1988).
Historically, the port remained close to the Mandraccio area due to its natural shape, which sheltered the coast. In 1650, to protect the city from possible sea attacks, the “Muragliette” were erected as fortifications, creating an important barrier between the port and the city. In 1836, these were replaced with the “Terrazze di Marmo” (Poleggi & Stefani, 1985). Starting from the second half of the 19th century, the port began expanding westward, the first rail lines were built for transporting goods, and new industrial facilities were built in the western port area. During the 1970s and 1980s, the port of Genoa entered a deep crisis due to the steel industry's decline and the shift to containerized transport systems (Sirolli & Poggi, 1988).
Alfred Noack (1880 ca.), Genoa. Terrazze di Marmo. Wikimedia Commons.
In the 1980s and 1990s, the city began a series of initiatives to restore both the city and the port, which were in a deep state of decay. In the 1990s, the new Voltri container terminal was completed, and in 1992 the city hosted the expo "Christopher Columbus: the ship and the sea," which allowed for the recovery of the historic port for urban use and initiated a revitalization process for both the city and the port. This ongoing process led to the restoration of several historic center areas for the 2001 G8 summit and continues nowadays with the renovation of the Fiera del Mare area to the east of the city (Gastaldi, 2010; Gastaldi & Camerin, 2016).
Stefano15. (2012). Genoa. The Mandraccio area at the Porto Antico. CC BY-SA 4.0, Wikimedia Commons.
Genoa is the capital of the Liguria region and one of Italy's main cities, with a population of approximately 560,000 inhabitants. The city is renowned primarily for its port, which is the largest in Italy and one of the most important in Europe and the Mediterranean basin. The city is distinctive for its unique location, nestled in a narrow space between the sea and the mountains, making it a linear city about 22 km in length. During the 20th century and up until the 1960s, the city experienced a demographic boom mainly due to the expansion of its port and associated industrial activities, particularly in the steel and mechanical engineering sectors. Although since the 1980s and 1990s the city has pursued a transition towards the tertiary sector (80% of the workforce in 2020) (Comune di Genova, 2021), Genoa remains deeply characterized by a significant working-class presence and various labor movements. Currently, the main economic sectors of Genoa are port-related logistic activities, transports, tourism, and research/innovation. However, due to extensive redevelopment and enhancement plans for the old waterfront and the historic city center, a gentrification process is now affecting large areas of the historic center (Gastaldi, 2015). A notable event in Genoa’s contemporary social history is the 2001 anti-globalization uprising during the G8 summit. The city was under strict lockdown for security reasons, and protests organized against the summit were violently suppressed by police forces (Binetti, 2007). Also noteworthy is the collapse of the Polcevera viaduct in 2018. The collapse manifested the negligence of public administrations in maintaining strategic infrastructures and became a national scandal (43 people died) (Prefettura di Genova, 2018). The bridge was rebuilt based on a design by the Genoese architect Renzo Piano.
Sabas88 (2014). Container moving inside SECH container terminal in Genoa. CC BY-SA 4.0, Wikimedia Commons.
The historic center of Genoa is one of the largest and best-preserved medieval centers in Europe. The city has a strong port identity rather than a maritime one. Indeed, the city has historically been quite disconnected from the sea due to the presence of a large port. The efforts to re-establish this connection only began in the 1990s. The gradual rehabilitation process of the historic city, which began with the Expo of 1992, led to Genoa being named the European Capital of Culture in 2004. Since 2006, the “Strade Nuove and the system of the Palazzi dei Rolli” in Genoa have been included among UNESCO’s World Heritage Sites. In recent decades, the city has shifted its focus to joint planning between the city and the port, both in terms of urban development and enhancing the city's attractiveness and image (Imbesi & Moretti, 2023). Today, Genoa is home to several research and technological development institutes, primarily focusing on marine-related themes. Among the most notable cultural institutions are the Aquarium of Genoa (the largest in Italy) and the more recent Galata Maritime Museum. Genoa hosts the Regatta of the Ancient Maritime Republics, a rowing competition between teams from Italy's four medieval maritime republics: Venice, Genoa, Amalfi, and Pisa. Each year, Genoa hosts at the Fiera del Mare the Salone Nautico, one of the most important international boat exhibitions. Jeans fabric was invented at the port of Genoa as working fabric, and the city is particularly renowned for its culinary tradition, of which it can boast pesto, focaccia, and farinata.
Alex2015Genova (2015). Via Garibaldi, Genoa. Wikimedia Commons.
The city of Genoa, like other areas in the Ligurian region, is situated in a territory highly vulnerable to climate change. The urban area is developed in a narrow strip of land between the sea and the mountains, crossed by several water streams that channel all the rainwater flowing down from the surrounding mountains. The two main streams running through Genoa are the Polcevera in the west and the Bisagno in the east. As streams, they are generally dry but can swell dangerously during heavy rains, posing significant flood risks. Due to the culverting of most of these streams and the increasingly intense rainfall caused by climate change, the city has experienced several floods in recent years with severe consequences. The most significant occurred in November 2011, resulting in the loss of six lives (Città di Genova, 2011). The municipality has initiated awareness campaigns among the population, but the goal of addressing the issue from an infrastructural standpoint remains far off. The port of Genoa is emitting a hug of CO2 (537.520 t/year) mainly due to ships stopping and maneuvering (Documento di Pianificazione Energetico Ambientale, 2019). The Port Authority has adopted a Document of Environment-Energy Planning which focuses on strategies to reduce the port carbon footprint.
The Liguria region has several protected parks, including one national park, nine regional parks, four nature reserves, and two marine protected areas. The diversity of landscapes is matched by a variety of habitats, resulting in the high level of biodiversity that characterizes the Ligurian coastal marine environment. This also includes numerous animal and plant species inhabiting the seabed, as well as protected areas for cetaceans. The enhancement and protection of biodiversity in Liguria are governed by Regional Law No. 28/2009. In the province of Genoa alone, there are 37 Special Areas of Conservation for biodiversity (Regione Liguria). The Municipality of Genoa has set goals for environmental protection and enhancement, establishing a Center for Environmental and Sustainability Education in 2006. The center aims to promote educational, informational, and training programs for sustainable development (Comune di Genova). However, the presence of the large port of Genoa significantly impacts existing ecosystems, and its expansion during the 20th century resulted in the loss of extensive coastal areas west of Genoa's historic center. Of particular interest is the construction of the Biosphere at the Old Port for the G8 summit in 2001, designed by Renzo Piano. The Biosphere houses the Municipality of Genoa's fern collection along with several bird species.
Utente1989. (2018). La Biosfera di Genova. CC BY-SA 4.0, Wikimedia Commons.
Thank you to Christoph Strupp for his contributions to this section. He is a historian working at the Forschungsstelle für Zeitgeschichte in Hamburg (FZH) / The Research Center for Contemporary History in Hamburg.
Heineken, P. (1730). Hamburg. Staats- und Universitätsbibliothek Hamburg, Public Domain Mark 1.0.
“The city of Hamburg has a Hanseatic history of trade, autonomy and economic power, but also of hardship and war” as presented by the official website of the city. The city’s full name, the Free and Hanseatic City of Hamburg, is a reference to this history of maritime trade and political autonomy as key sources of local identity and pride.
Born in the 9th century from a castle between the Alster and Elbe rivers, in 1189 Hamburg was granted the title of ‘Free Imperial City’ in the Holy Roman Empire. Hamburg was also granted special trading rights and tax-free access to the lower Elbe River (City of Hamburg, 2024). This supported the growth of Hamburg’s trading power, economic importance and population size which continued for centuries despite challenges. It also supported the establishment of the tradition of self-organization of the Hamburg traders and citizens in managing the city’s affairs (Engels et al., 2024).
Between the 13th and 15th century, Hamburg was part of the Hanseatic League, a powerful trading alliance between coastal cities and merchants of Northern Europe which dominated commercial activity and brought Hamburg to prominence as a major transit center to Central Europe and Russia. Merchants organised in guilds (Ämter) which formed the basis of economic organisation in the city and influenced local government. The Rat (City Council) facilitated the arrival of foreign merchants seeking to establish businesses in Hamburg (Prateek, 2017; Breuilly, 1992).
By the middle of the 16th century, Hamburg surpassed Lübeck, becoming the most powerful port city in Germany and first commercial center of Northern Europe. Hamburg rose as a transhipping center, global marketplace and financial center that connected markets in England, Germany, Hungary, Poland, the Baltic, and the Mediterranean, facilitating the trade of goods like sugar, tobacco, iron, etc. Also in this period, Lutheranism became the state religion in Hamburg which led religious refugees from France and the Netherlands to seek asylum in Hamburg, later followed by Portuguese Jews (City of Hamburg, 2024). This migrant population provided benefits to Hamburg’s international trade connections, economic prosperity and population growth but faced xenophobia and antisemitism (Intoxicating Spaces, 2024).
“Water is early modern Hamburg’s defining geographical feature” according to the research initiative ‘Intoxicating spaces.’ The merchants benefited from direct water access to the port at the intersection between the Alster and the Elbe river, and traveled from there to the North Sea via the Elbe or downstream to Germany and Easter Europe. The creation of new and improved waterways (for instance in the 17th century) was important for the international port city. At this time the Rat (City Council) also invested in new urban spaces for leisure and culture including parks, theaters, etc. Hamburg presented itself as a ‘merchant republic’ governed by its citizens (‘burghers’) although in practice, some 15-20% accessed this ‘burgher status’ (male, Lutheran, property owner) and the city’s elite of merchants and lawyers had more political power (Intoxicating Spaces, 2024).
However, the growing demand for industrial labor from industrialization processes created a large number of working poors in Hamburg, living in overcrowded, low quality housing. In addition, Hamburg was particularly vulnerable to plagues and epidemics, as a port city where diseases could spread as a result of maritime exchange (Schubert et al., 2022). Epidemics and diseases had a severe toll on the city resulting in the fact that “in most years mortality (deaths) in the city outstrips fertility (births), and only around half of children born survive to the age of ten” (Intoxicating Spaces, 2024).
In 1815, Hamburg was liberated from Napoleon’s French army and reestablished as a ‘free city’ within the German confederation. Hamburg also adopted a democratic constitution in 1860 that established freedom of press, assembly and association as well as the separation between church and state. Hamburg became part of the German Empire in 1871 and was able to preserve much of its political autonomy, up to today (City of Hamburg, 2024). During this period, Hamburg merchants took part in the transatlantic trade, facilitating the movement of slave-produced goods into continental Europe (von Mallinckrodt et al., 2021). According to the ‘Intoxicating Spaces’ research project, “Although it has no colonies of its own… Its mercantile success thus provides the machinery for and perpetuates imperial oppression and exploitation.”
Throughout the 19th century and despite several catastrophes for the city (Great Fire, Cholera epidemic), Hamburg kept growing, absorbing surrounding cities and countryside. By the end of the century, it had become the second largest port in Europe, Germany’s “gateway to the world” - from where over five million Europeans emigrated, especially towards America - and quadrupled its population, reaching some 800,000 people (Schubert et al., 2022; City of Hamburg, 2024).
The Two World Wars left a huge mark on Hamburg. Under Nazi Germany, the Jewish community of Hamburg - which was the largest in Germany before the war - was dislocated, from around 20,000 ‘religious Jews’ in the 1920s to less than 1,000 by the end of the war (Jörg Berkemann 2018). Thousands were murdered. In 1943, the city was heavily bombed by the British and American airforces, killing more than 40,000 civilians and massively destroying infrastructure (50% of homes, 40% of industrial areas, 80% of the port area)’ (City of Hamburg, 2024). Reconstruction was rapid, but in 1962, a massive flood overwhelmed dykes and submerged almost one-sixth of the city, killing more than 300 people (Engels & al., 2024). In the following decades, Hamburg improved its flood preparedness, and grew again to reach some 1.8 million inhabitants, benefiting from immigration as well as increased trade with central Europe after the reunification of Germany in the 1990s (Thomsen & McIntosh, 2024).
Today Hamburg continues to be a major trading center (although its port has fallen behind Rotterdam and Antwerp) but has also diversified its economy. It is also an attractive place for tourists and residents who have a high overall quality of life, although large inequalities remain (The Academy of Urbanism, 2013).
Rabich, D. (2016, June 11). Landungsbrücken and ship “Queen Mary 2”, Hamburg, Germany. CC BY-SA 4.0, Wikimedia Commons.
The Port is inseparable from Hamburg’s history and identity until today. It remains an primary feature of the city and its economy even though Hamburg has diversified its economy and the port has lost its dominance in European and global trade.
The port of Hamburg is the third biggest in Europe after Rotterdam and Antwerp. It receives cargo shipments, especially from China as the first origin and destination country, and connects maritime transport with land-based transport (rail and road) to the German hinterland, Central and Eastern Europe, and the Baltic region (OECD, 2024). In 2023, the port processed 7.7 million TEU (‘Twenty-foot Equivalent Unit’, the general unit used to measure ports’ capacity to process cargo/containers), 70% of which was container throughput (Port of Hamburg, 2024). The Port of Hamburg is also the largest rail port in Europe.
The official creation of the port goes back to 1189, when Hamburg ships were granted customs-free navigation access along the Lower Elbe River towards the North Sea. The port grew in the following decades (and the city with it), especially from the period of the Hanseatic League (13th - 15th century). From the 15th century, with the exploration and colonisation of America, Hamburg increasingly forged relations with foreign ports and became connected with international trade, surpassing other European leading ports like Lübeck.
The port was developed extensively during the 19th century, and became an open tidal port (port whose water levels are influenced by tides), with quays and sheds along both banks of the River Elbe. The rail system for ship-to-rail transfer was also developed in the late 19th century. After Hamburg joined the German Customs Union in 1881, the Freeport area was built to store imported goods duty-free (the free trade zone was dissolved in 2013), and included the Speicherstadt, a large warehouse which became a key landmark of the city.
By the early 20th century, Hamburg was the leading port in continental Europe and the third largest port in the world after London and New York. During World War Two, 80% of the port facilities were destroyed which required massive reconstruction efforts. In the late 1960s, another turning point was the ‘containerization’ and globalization of trade via large, standardized containers loaded on ever larger ships. As a result the port of Hamburg has built several container terminals and heavily dredged the Elbe river to allow for the passage of large ships, resulting in massive ecological destruction. Since 2020, ships with an added ship width of up to 98 metres can access the port. In recent years the Terminal has also invested in electrification to reduce its CO2 emissions and present itself as a European leader in sustainable maritime transport (Port of Hamburg, 2024).
Another key recent development is the megaproject HafenCity, which is redeveloping 157 hectares of former port and industrial land in the center of Hamburg into new waterfront urban areas with artificial mounds (‘warfts’) and floodable quays that aim to address flooding risk without cutting off the area from the water with dikes and barriers (Port of Hamburg, 2024). With this, Hamburg aims to set new standards of integrated urban development for waterfront cities in Europe, that bring together maritime identity and sustainability with a high-density mix of workplace and residential uses, education, culture and leisure, tourism and retailing (HafenCity 2024). The project aims to create 7,000 dwellings and over 45,000 jobs (Port of Hamburg, 2024).
Despite these moves, there is a general decline of the port in terms of competitiveness and economic profitability. In Europe, the port has fallen behind Rotterdam and Antwerp. The port’s highest volume of container handling was reached in 2014 and has not been surpassed since. Several factors can help explain this, like “the decrease of empty containers handling, a lower number of transshipments in cargo ships, and the rise of container activity via railway” as well as a “failure to modernise and expand transport infrastructure” (TransGlory, 2018; Kędzierski, 2024).
Hamburg is the second largest city in Germany and seventh largest in the European Union, with some 1.9 million inhabitants in the city and 5.4 million in the metropolitan area (Statistisches Bundesamt, 2023). As a city-state, Hamburg is administered by a State Parliament (Bürgerschaft) and a Senate, which acts as government (Senat) and is headed by the ‘First Mayor’ (Erster Bürgermeister). Overall, residents enjoy a high quality of life, thanks to a dynamic economy, rich cultural life and access to green and blue spaces (parks, lakes and rivers) among others. Sports are also popular, and Hamburg hosts Germany’s first athletic and rowing clubs (Thomsen & McIntosh, 2024). Hamburg’s population is expected to grow beyond 2 million by 2030, which increases the need for housing (City of Hamburg, 2024b).
Fronl. (2023, March 18). Blick auf die Außenalster an der Schönen Aussicht in Hamburg. CC BY-SA 4.0, Wikimedia Commons.
With a GDP of over 150 billion euros in 2023 (the highest of the German states), Hamburg is a wealthy yet unequal city, home to billionaires but also low-income inhabitants (City of Hamburg, 2024b; OECD, 2024). These tend to be concentrated in areas like Hamburg-Wilhelmsburg, which are more vulnerable to water hazards (Engels & al, 2024). According to Frieden et al. (2023), Hamburg ranks among the top 5 percent of the most unequal municipalities in Germany. The industrialisation of port activities has contributed to the large working class population living in Hamburg and its large migrant population, consisting of more than 30% of residents (Hamburg Chamber of Commerce 2024). Immigration contributes to Hamburg’s vibrant and diverse culture, and plays an important role for Hamburg’s economy and population growth, due to low fertility rates. However, the migrant population has been deeply impacted by racial discrimination and far-right violence, including assaults and homicides, especially in the 1970s and 1980s (HAMREA, 2024).
The port, maritime industries and logistics remain dominant in the city’s economy although the port’s recent decline raises questions for its future role and the need to develop other sectors. One illustration of this is Hamburg’s efforts to present itself as a ‘Smart City’ with an advanced digitalisation, economic efficiency and climate resilience (Bär et al., 2020). The city-state government has invested heavily in entrepreneurship, ICT, education and research, and in the health and environmental sectors. Hamburg is also flourishing in the sectors of aviation, biotech and media and creative industries (City of Hamburg, 2024c). Hamburg’s role as a press centre for newspapers dates to the 17th century. The city has a wide range of publishing firms and newspapers like the Hamburger Abendblatt and the Hamburger Morgenpost (Thomsen & McIntosh, 2024).
However, according to Bärt et al (2020), Hamburg’s focus on innovation and ‘smart solutions’ excludes parts of the population and does not sufficiently address urgent ecological issues. Polluting activities continue to be at the heart of the city-state’s economic model. Aircraft and petroleum products were among Hamburg’s most important export and import goods in 2023 (City of Hamburg, 2024b). Manufacturing, which is a large contributor to Hamburg’s economy, is also particularly energy and emission-intensive. This is especially due to oil refining, the production of iron and steel and the production of aluminium. Energy transformation (oil, coal, natural gas) and transport are the most emission-intensive sectors in Hamburg (OECD, 2024).
Hamburg has a rich and diverse culture. Hamburg’s long tradition of self-rule influences the local culture and sense of pride among inhabitants (Thomsen & McIntosh, 2024). Maritime identity and the port continue to be major cultural influences in Hamburg, not least due to its rivers and canals, and because the port continues to be located in the heart of the city, unlike in many other port cities. Water is ever present in the daily practices of many inhabitants who walk on bridges above waterways and enjoy Lake Aster and its green surroundings for water sports and social activities. The Alster swans are protected by law since 1664 and have been an emblem of the city for 400 years.
The city has some 2500 bridges, which surpasses the amount of bridges in Amsterdam, London and Venice together (Guinness World Records, 2013). The Speicherstadt (a UNESCO Heritage Site since 2015) and Hamburg fish market are landmarks reminiscent of the city’s water heritage. A newer architectural landmark is the Elbphilharmonie, a concert hall built atop an old warehouse by the Elbe river, whose glass structure reflects both water and sky (City of Hamburg, 2024d). The presence of the International Tribunal for the Law of the Sea’s headquarters in Hamburg is yet another sign of the city’s connections with water. New urban development projects in the city, such as HafenCity, seek to revive the maritime heritage of the city, mixing it with housing, workplaces and climate-resilient public spaces like floodable quays (AIVP, 2024).
Rabich, B. (2016, June 11). Wasserschloss in the Speicherstadt, Hamburg, Germany (2016). CC BY-SA 4.0, Wikimedia Commons.
Hamburg also has a vibrant gastronomic, artistic, musical and nightlife culture, alongside its mix of traditional Hanseatic and modern architecture. The city hosts many festivals and major museums like the Kunsthalle and orchestras like the Philharmonische Staatsorchester. As the birthplace of Mendelssohn and Brahms, Hamburg has maintained a strong musical tradition alive with its music clubs (which helped launch the Beatles’ career in the early 1960s) and its renowned hip-hop music scene (City of Hamburg, 2024e). The annual Reeperbahn Festival, held in Hamburg, is the largest club festival in Europe (World Cities Culture Forum, 2024).
While the city hosts more than 300 cultural institutions, there are disparities of access. According to a recent survey, visitors are on average 51 years old, well-educated (64%) and have a medium- (54%) or high income (31%). 36% of non-visitors to cultural institutions cited price as an explanation (City of Hamburg, 2024f). The city-state aims to promote cultural diversity by providing funds for intercultural arts and culture projects and festivals (City of Hamburg, 2024g). The annual Altonale festival, which brings together film, theater, music, art, literature, dance and street art and promotes cultural diversity, is a very popular event in Northern Germany which attracts over half a million visitors each year.
Hackercatxxy. (2016). Elbphilharmonie Hamburg. CC BY-SA 4.0, Wikimedia Commons.
Hamburg has a temperate and maritime climate and is located in a flood-prone area, as shown by the catastrophic flood of 1962 which submerged almost one-sixth of the city and killed over 300 people (Mauch, 2012). The risks of flooding (from groundwater, from the river and from the coast) and storm surges are exacerbated by climate change. Sea-level rise, more intense storm surges, groundwater rise and more regular, heavy rainfall increase the risk of flooding and of compound events. For example, the storm series in February 2022 which led to extreme wind gusts, heavy rainfall, high water levels and high river discharges around Hamburg (Engels & al., 2024).
Because of this context, 67% of Hamburg residents consider climate change to be a major or very major threat to the city and 62% report having been personally affected by a natural disaster in Hamburg, based on data from 2023 (Ratter & Scheunpflug 2023. In: Engels & al., 2024). In accordance with this, there has been a long history of climate change mitigation and adaptation in Hamburg, with a growing emphasis on adaptation in recent years. Indeed, Hamburg adopted the first Climate Protection Act in Germany in 1997, was appointed as the second European Environmental Capital in 2011, and adopted a dedicated Climate Adaptation Plan in 2023 (Engels & al., 2024).
Urbanisation has also made Hamburg more vulnerable to floods due to the increased sealing of urban surfaces, but the city-state is investing in nature-based solutions like green spaces and roofs as well as the restoration of wetlands. Balancing the needs for more housing and for green infrastructure remains a challenge for Hamburg to adapt to climate change, according to Engel et al. (2024).
An important development is the megaproject HafenCity, which is redeveloping 157 hectares of former port and industrial land in the center of Hamburg into new waterfront urban areas with artificial mounds (‘warfts’) and floodable quays that aim to address flooding risk without cutting off the area from the water with dikes and barriers (AIVP, 2024). With this, Hamburg aims to set new standards of integrated urban development for waterfront cities in Europe, that bring together maritime identity and sustainability with a high-density mix of workplace and residential uses, education, culture and leisure, tourism and retailing (HafenCity, 2024).
Dressler, H. (2023, November 26). The Stubnitz in the Hafencity Hamburg. CC BY 4.0, Wikimedia Commons.
Overall, the growing effects of climate change are testing the limits of Hamburg’s current flood protection infrastructure, composed of dikes, storm surge barriers, adaptive urban planning and increasingly nature based solutions. Growing climatic risks suggest the need to continue investing in adaptation measures while balancing the need for more housing in the city (Engels & al., 2024).
Hamburg is located in a transitional estuarine coastal zone, connected to the North Sea via the river Elbe. Hamburg and its port activities cannot be separated from the wider ecosystem of the region, and most notably the Wadden Sea, the largest sedimentary tidal flat system in the world (Rittelmann, 2021). The intertidal zone of more than 11,000 square kilometres is located in the southeastern part of the North Sea and spans across Germany, Denmark and the Netherlands.
Roletschek, R. (2013, September 29). Island Neuwerk near Hamburg in the German Wadden Sea. CC BY-SA 3.0, Wikimedia Commons.
The Wadden Sea, which figures on the UNESCO World Heritage List since 2009, has a unique dynamic environment of transitional zones between land, the sea and freshwater environment, affected by tides and winds. As a result, the area provides many different types of habitat (tidal channels, sandy shoals, sea-grass meadows, mussel beds, sandbars, mudflats, salt marshes, estuaries, beaches and dunes) for diverse plants and animal species, like seals, fish but also small arthropod species like insects and spiders. The salt marshes host around 2,300 species of flora and fauna, and the marine and brackish areas a further 2,700 species, and 30 species of breeding birds. The area is also one of the most important in the world for migratory birds, with an average of 10 to 12 million birds each year (UNESCO, 2024). At the west of the mouth of the Elbe, the Hamburg Wadden Sea National Park hosts a variety of plants, birds, fish, marine mammals, as well as human residents and tourists.
Dirk Schmidt (Celsius auf Wikivoyage). (2009, May). Germany / North Sea / Wadden Sea between with Islands Amrum and Föhr: some seals. CC BY-SA 3.0, Wikimedia Commons.
But despite its protected areas, the Wadden Sea has been heavily altered by human influences over the last 1,000 years. 144 species became extinct or severely depleted due mainly to habitat loss and overexploitation, while the livelihoods of human coastal societies were transformed from fishing, agriculture and hunting to service-based economies. Many forms of natural and cultural heritage were lost (Lotze et al., 2005). These shifts were particularly visible around Hamburg. Indeed, interventions to expand the port and city and build dykes to protect against floods accelerated from the 18th century onwards, deeply altering the estuarine environment. The expansion of the port has transformed wetlands and marshes into port areas, and the river Elbe has been heavily dredged to allow for the passage of larger and larger ships. Coastal protection measures have created a border between land and water spaces.
The dredging of the Elbe river has accelerated the sedimentation process, creating a growing need for land and marine disposal sites where toxic sediments are dumped. In Moorfleet, for example, a hill of dredged sediments is set to reach 56 m above sea-level according to Hein & Hilder (2023). The continued port expansion and river dredging has sparked resistance and conflicts of interest. For instance, fisherfolks and environmental NGOs have protested the loss of marine species like fish and shrimp, due to the impact of hydrological interventions on marine habitats. Hydrological interventions have also made the estuary more unpredictable (increased tidal range and tidal pumping) and have accelerated erosion, as shown by the disappearance of the former island Medemsand during the 2000s (Hein & Hilder 2023). In the 2010s, scientific studies warned that further dredging the Elbe river risked causing ‘irreparable damage’ to the river ecosystem, and a legal complaint was lodged by environmental NGOs to prevent the dredging project. However, it took place nonetheless and a navigation channel of some 17 meters below sea level was established in 2021 (Spiegel International, 2013; Hein & Hilder, 2023).
Malmö, founded in the late 13th century, grew into a significant trading hub due to its strategic location. The Malmöhus Castle, built in the 15th century, played a crucial role in defending the city.
Malmö in 1594: Malmö Castle can be seen at far left, Sankt Petri Church's tower at centre. Braun, G. (1594). Map of Elbogen. Digital Library of University of Wroclaw. Public domain, Wikimedia Commons.
Malmö's historical trajectory reflects significant transformations influenced by various socio-economic factors. After gaining city rights in 1437, Malmö oscillated between Danish and Swedish control, with wars and treaties marking its governance. The 19th century heralded industrialization, establishing Malmö as a key industrial hub, which was later disrupted by the World Wars that adversely affected its economy and demographics (Holgersen, 2013; Holgersen, 2014).
Post-war recovery saw a resurgence in industrial activities and urban development, yet the late 20th century brought a decline in traditional industries, prompting a strategic pivot towards services, technology, and education (Listerborn, 2017). This transition aligns with broader trends in urban planning, where Malmö has embraced a post-industrial identity, focusing on knowledge-based initiatives and sustainable urban environments (Listerborn, 2017). The city's response to economic crises, particularly in the 1990s and 2008, further illustrates its adaptive strategies in urban policy and planning (Holgersen, 2013; Holgersen, 2014).
Malmö, Sweden. Castor, D. (2014, September 6). CC0, Wikimedia Commons.
The opening of the Øresund Bridge in 2000 connected Malmö to Copenhagen, integrating it into a larger metropolitan area (Ejermo et al., 2021). Today, Malmö is a vibrant, multicultural city known for its modern architecture, sustainability initiatives, and cultural scene.
Malmö, with a population of approximately 350,000, is characterized by its significant multicultural population, with approximately one-third of its residents being foreign-born (Bennet et al., 2016). This diversity enriches the city's cultural landscape and presents unique challenges and opportunities in education and social integration.
Malmö's commitment to sustainable living is exemplified through its diverse housing options and eco-friendly initiatives, which have garnered recognition as a leading "eco-city" alongside other global examples (Busch & Anderberg, 2015). The city's urban development, particularly in areas like Norra Sorgenfri, emphasizes sustainable practices that prioritize everyday life over spectacular projects (Tran & Rydin, 2019). Furthermore, Malmö benefits from Sweden's robust welfare system, which contributes to a high standard of living for its residents, essential for social sustainability (Plaskonis, 2019).
Economically, Malmö has transitioned from traditional industries to a focus on technology and services, significantly influenced by its integration into the Öresund Region via the Øresund Bridge. This infrastructure has facilitated the attraction of human capital and innovation, enhancing the region's economic dynamics (Ejermo et al., 2021; Hansen, 2013).
The Öresund Bridge, connecting Malmö to Copenhagen and the Scandinavian peninsula with Central and Western Europe through Denmark. Fpo74. (2006). CC BY-SA 3.0, Wikimedia Commons.
Malmö exemplifies a harmonious blend of historical and contemporary architecture, highlighted by landmarks such as the Renaissance-era Malmö Castle and the modern Turning Torso. This architectural diversity reflects the city's rich history and its commitment to innovation and sustainability, particularly in areas like the Western Harbor, which emphasizes eco-friendly development practices.
The cultural landscape of Malmö is vibrant, with institutions such as the Malmö Art Museum and Malmö Opera playing pivotal roles in enriching the community's artistic life. Furthermore, the city's multicultural atmosphere is enhanced by its diverse population, contributing to a rich tapestry of culinary offerings that showcase global influences permeating the local culture. This interplay of heritage and modernity, along with a strong focus on sustainability and inclusivity, positions Malmö as a dynamic urban environment that fosters creativity and community engagement.
Malmö's temperate oceanic climate is increasingly affected by climate change, leading to rising temperatures, sea-level rise, and intensified precipitation events, which threaten urban infrastructure and ecosystems (Bibri & Krogstie, 2020). In response, the city is investing in green spaces and sustainable transportation initiatives, which are crucial for enhancing urban resilience and mitigating climate impacts (Brunklaus et al., 2022; Tran & Rydin, 2019). The implementation of nature-based solutions is particularly significant, as these strategies leverage ecological processes to improve water management, reduce flooding, and enhance thermal comfort (Boogaard et al., 2020).
Furthermore, Malmö's commitment to circular economy principles in public procurement reflects a broader strategy to integrate sustainability into urban planning and development (Brunklaus et al., 2022). These efforts not only aim to address immediate climate challenges but also to foster long-term social and environmental sustainability within the city (Gressgård, 2015; Listerborn, 2017).
Malmö is home to a variety of plant species, including both native and non-native flora. Common trees in the region include oak, birch, and various conifers, while the area supports diverse animal species such as the European herring gull and mammals like foxes and deer. The city's parks, gardens, and green roofs contribute to urban biodiversity by providing vital habitats for pollinators, birds, and small mammals.
Pildammsparken with the old water tower. Jorchr. (2006). CC BY-SA 3.0, Wikimedia Commons.
The coastal areas along the Öresund Strait boast rich marine ecosystems, featuring seagrass beds and rocky shores that are essential for marine biodiversity. Malmö is recognized for its commitment to sustainability, integrating green infrastructure and water management practices aimed at protecting and enhancing local biodiversity. The city actively participates in conservation projects focused on restoring habitats, safeguarding endangered species, and improving water quality within local ecosystems.
Thank you to Léa Kayrouz for her work on this section. She is a researcher at the Department of History of Architecture and Urban planning, Delft University of Technology. She focuses on water systems design and value-based approaches, along with a particular interest in researching ownership patterns and weathering in the Lebanese mountains.
‘Rotterdam’ means ‘The Dam on the River Rotte’. From a small fishing village, the construction of a dam on the river Rotte in 1270 allowed Rotterdam to grow into a city. Rotterdam made use of its strategic location along the river and became a local hub for trade between the Netherlands, England and Germany in the 1350s when the Rotterdamse Schie shipping canal was completed (Paul van de Laar 2021).
Hogenberg, F. (ca. 1530-1590). Rotterdam in 1572, during the siege of the city by the Spanish army during the Eighty Years' War. Wikipedia Commons.
From the 1600s, Rotterdam was deeply involved in the Atlantic slave trade and the activities of the Dutch East India Company and the Dutch West India Company, two trading companies created to expand the Dutch commercial and colonial empire through economic and military means. The port of Rotterdam continued to grow, especially after the digging of the Nieuwe Waterweg in 1872, a shipping canal which allowed large ships to access Rotterdam from the North Sea (Paul van de Laar & Peter Scholten 2023; Pepijn Brandon 2017).
During World War II, Germany invaded the Netherlands and heavily bombed Rotterdam, destroying most of the city center including the homes of some 80,000 Rotterdamers. One day after the bombing, on 15 May 1940, the Dutch army capitulated. After the war, Rotterdam was rebuilt into a modern city whose architecture attracts international attention (Antonius Robben 2021; Paul van de Laar 2021).
Unknown author (1940). Rotterdam in 1940 after the bombing by the German Army. Wikipedia Commons.
Mlefter. (2012). Rotterdam in 2012, with a view on the Erasmus bridge and the ‘Kop van Zuid’ district built from the 1990s on the south bank of the Nieuwe Maas river. Wikipedia Commons.
From the late 1800s, the port gradually expanded over 40 km towards the North Sea due to its evolving function as a transit port, increasingly industrialized and dominated by the oil and petrochemical industries as of the 1940s. The Maasvlakte, a massive extension of the port built on land reclaimed from the North Sea, from the 1970s until the 2000s. For instance, Maasvlakte 2 constructed between 2009 and 2013 covers 2000 hectares including 1000 hectares for industry (Port of Rotterdam 2024). Rotterdam has been called ‘an extreme example of port city separation’, where the port activities have become largely disconnected from the city and its inhabitants, in the process of becoming increasingly connected to global trade (Carola Hein & Paul van de Laar 2020).
Lindwurm, L. (2021). Cruise ship of the Holland America Line in the Maasvlakte port of Rotterdam. CC BY-SA 4.0, Wikipedia Commons.
Rotterdam is the second largest city in the Netherlands after Amsterdam, with a population of over 1 million in its urban agglomeration) (World Population Review 2024). It is known for its port, university, riverside setting, lively cultural life, maritime heritage and modern architecture. In addition to the port, Rotterdam has diversified its economy towards industry, services (finance, insurance, business), sustainability and innovation, for instance in IT & tech.
Today, Rotterdamers have the best proficiency in English as a second language in the world (Amber van Workum 2019). Immigration allowed the population of the city to keep growing despite declining birth rates in the Netherlands (Centraal Bureau voor de Statistiek 2024). It has turned Rotterdam into a multicultural and multiethnic city home to over 170 nationalities. Immigration was driven by different factors, including post war labor migration around the port (Spain, Italy, Turkey, Morocco, Cape Verde), the (de)colonization process (Surinam, Antilles), the fall of the Soviet Union in the 1990s, the arrival of refugees from conflict (Iraq, Somalia, …), etc (Maurice Crul, Frans Lelie & Elif Keskiner 2018).
Rotterdam faces problems of poverty, inequality and gentrification (Paula Arellano Geoffroy 2020), with a lower employment rate (69%) than in the rest of the Netherlands (79%) (Portico). In 2019, the city had the highest proportion of poor residents (around 11%) and of children at risk of living in poverty (16.5%) in the Netherlands (Bart van Hulst & Stella Hoff 2019; Centraal Bureau voor de Statistiek 2021). There is also a dire housing shortage in the city (and the rest of the Netherlands) leading house prices to skyrocket (Centraal Bureau voor de Statistiek 2022).
The Port of Rotterdam is Europe’s largest seaport and a major logistical and economic center for container shipping as well as the oil and petrochemical industries. In 2023, over 18,000 ships went through the port carrying a total cargo throughput of some 440 million tonnes. The Port also houses sub industries such as maritime business services, shipbuilding, offshore services, and hydrogen and commodity trading. It aims to become ‘the world’s smartest port’ via innovation, digitalisation and increased logistics efficiency (Alessandro Gandolfi 2022).
Port of Rotterdam. Vorpzn (2018). Wikipedia Commons.
Rotterdam’s past and present of water management, maritime heritage, urban development and migration shape the city’s landscape and identity. Rotterdam has a vibrant and renowned cultural scene, making it a hub for creative industries, especially design, art and architecture. The city hosts events such as the summer festival, a ‘multicultural celebration uniting participants from the Caribbean, Central and South America and Africa living in the Netherlands’ (UNESCO); as well as the International Film Festival Rotterdam, North Sea Jazz Festival and International Architecture Biennale Rotterdam.
The city and port of Rotterdam grew in an interconnected way over the centuries, but have detached gradually since the late 1800s as the port expanded outside of the city and into the sea (Hein, 2020). Rotterdam’s waterfronts, harbours and docks, once key sites of city life and commercial interactions, had to be redeveloped and re-integrated in the urban core. Rotterdam has ‘invested tens of millions of euros to reinvent and memorialize Rotterdam’s maritime identity and to recover the mutual relationship between the city and the port’ (Hein, 2020). For instance, the Maritime Museum is located at the birthplace of the port and features old ships and lighthouses. The city’s modern architecture and key landmarks (Erasmusbrug, Cube Houses, Depot Boijmans etc.), described on the Miss Travel Clogs website (2020), also makes visible the city’s efforts at crafting its own identity following the destruction of World War II.
Kinderdijk, located some 15 km east of Rotterdam, is a symbol of Dutch water management and a UNESCO World Heritage site. It hosts 19 windmills built in the 18th century to drain the Alblasserwaard polder, which allowed people to continue living and farming on the land (Koohafkan, 2010).
Rotterdam has a sub-oceanic climate influenced by the North Sea and Atlantic Ocean. The weather is humid with frequent rainfall, cold winters and relatively cool summers (Rotterdam360). After a destructive flood which came from the North Sea in 1953, the National Delta works programme improved the coastal flood defenses in the area.
Rotterdam will be impacted by climate change, with an increased risk of flooding due to water ‘coming from the sea, the sky, the rivers, and the ground’ (Larnard, 2024). The Royal Netherlands Meteorological Institute predicts that the sea level might rise by 14 – 47 cm by 2050 compared to 1995 levels. Sea-level rise also poses increased risks of saltwater intrusion which affects agriculture and freshwater resources. In addition, extreme weather events like heavy rains during winter and droughts during the summer will become more likely and affect the water levels of the Rhine and Meuse rivers, leading to a higher risk of flooding in winter (Nazaruk, 2022).
Rotterdam is built on a swamp and has been heavily pumping excess groundwater for decades. As groundwater levels get lower due to more frequent droughts and the land continues to sink, some 30,000 houses (a fourth of Rotterdam) face risks of foundation problems. At the same time, the scarcity of houses is leading to the building of much more housing in flood-prone areas, making flood prevention needs even greater (Nazaruk, 2022).
The city of Rotterdam has adopted various Water Plans and climate policies to mitigate and adapt to climate change but it remains uncertain whether these efforts will be enough. Meanwhile, the port of Rotterdam (whose main shareholder is the city) is responsible for about 90% of Rotterdam’s CO2 emissions, and 16% of the Netherlands’ emissions (Nazaruk, 2022; Engelke & Webster, 2023).
Rotterdam is located in an area with a rich biodiversity. The Natural history Museum Rotterdam records over 4,600 fauna and flora species endemic to the region. But the Nature Indication Map, an initiative of the City, shows big differences between neighborhoods: some have very high biodiversity, others very low biodiversity (see Gemeente Rotterdam, 2023).
There has been major biodiversity loss in the process of engineering water and building a highly-industrial port-city like Rotterdam. The natural wetlands and estuaries of the Dutch Delta were drained for agriculture from the 12th century onwards. Digging new rivers and artificially deepening the Rhine-Meuse estuary to facilitate the passage of large ships have dramatically reduced the biodiversity-rich intertidal zones where sea and land meet to host a wide variety of species (Brands, 2022). This along with intense agriculture, pollution and increased transport and infrastructure (housing, paved surface) have put a heavy pressure on marine and coastal ecosystems like fish, plants, migratory birds, etc (see Rijkswaterstaat, 1995).
The city of Rotterdam is trying to improve biodiversity through policies (Biodiversity Policy Framework), campaigns (for instance, National Park Rotterdam) and actions, especially greening the city to improve human wellbeing and resilience to climate change (see Gemeente Rotterdam, 2024; Internationale Architectuur Biënnale Rotterdam, 2024). Attention to underwater life seems more limited, although tidal parks are also developed, as blue-green public spaces where the city meets the river and that contribute to biodiversity restoration (Brands, 2022). Overall, climate resilience, water security, and attractiveness for businesses are at the top of the city’s policy agenda. Ecological restoration is seen as a co-benefit of these policies rather than a priority (Frantzeskaki & Tilie, 2014).