Ephemeral architectures, characterized by their temporary and flexible nature, have emerged as powerful tools for revitalizing urban spaces and fostering architectural creativity. These transient installations transform public areas, engaging communities, and prompting reflections on the potential futures of our cities. By temporarily transforming environments, ephemeral architectures encourage both architects and the public to reimagine the possibilities of urban living. This dynamic interplay, between the temporary and the permanent, challenges traditional architectural practices and opens up new avenues for sustainable and inclusive urban development.
Karantina Public Park 2020-2023. Image Courtesy of CatalyticAction
Public spaces are not always shaped by planning but by the practices they host. Their existence stems from our inherent need for connection with others. As spaces of encounter, these urban, open, and accessible areas reflect how we interact with our surroundings and each other while offering places for exercise, play, socializing, and recreation.
Recognizing that public spaces are more than just physical environments, CatalyticAction is dedicated to fostering a sense of community, safety, and belonging, especially for children, who are among the most vulnerable in society. Their mission is not only to create spaces where children can play and grow but also to empower them, ensuring they have a voice in shaping their surroundings. To learn more about their work, Christele Harrouk, ArchDaily's Editor-in-Chief, spoke with Joana Dabaj, Co-founder and Director of Programmes at CatalyticAction.
To take advantage of the historic heritage of the city of Paris while also minimizing the impact of the Olympics, the Paris 2024 Games are organizing a set of temporary arenas and installations to host several key competitions, only to be disassembled after the games' closing. Only one sports venue has been built specifically for the 2024 Olympic Games, the Aquatics Centre Paris, as the city aims to use its existing sporting infrastructure to the maximum, ensuring a smaller footprint compared to previous editions. In addition to the established venues, key temporary sites include the Trocadéro, Eiffel Tower, Champ-de-Mars, Esplanade des Invalides, Pont Alexandre III, Place de la Concorde, and Place de l’Hôtel de Ville, with additional stands along the Seine for the Opening Ceremony.
The assembly and disassembly of these temporary sites will follow a step-by-step approach to minimize disruption. Geographical phasing will preserve traffic lanes and access to public spaces, while time phasing will gradually activate and deactivate competition perimeters to limit construction impact and quickly restore spaces post-Games. These measures align with Paris 2024's commitment to organizing responsible and respectful Games and preserving the city's urban and natural heritage.
CityMakers, The Global Community of Architects Who Learn from Exemplary Cities and Their Makers, is working with ArchDaily to publish a series of articles about Barcelona, Medellin, and Rotterdam. The authors are the architects, urban planners, and/or strategists of the projects that have transformed these three cities, which are visited in the "Schools of Cities" and studied in the "Documentary-Courses" made by CityMakers. On this occasion, Alejandro Restrepo Montoya, Director of Urban Planning and Architecture of Medellín, presents his article "Environmental Urbanism and Urban Geographies, Medellín 2024-2027"
Medellín's urban plan focuses on answering how urban planning can improve people's quality of life. By developing its proposal, the city is promoting the social benefits that these urban planning practices can generate. Medellín emphasizes the use of natural and environmental conditions, such as valleys, streams, rivers, mountains, and hills, to develop urban planning criteria that address social needs.
The Centre de Cultura Contemporània de Barcelona (CCCB) has announced the finalists for the European Prize for Urban Public Space 2024. Selected from a total of 297 projects corresponding to 35 European countries, the 2024 edition nominates 5 finalists in the General category, promoting quality public spaces throughout the European territory, and 5 in the Seafronts category, addressing coastal cities' climate vulnerabilities. The European Prize for Urban Public Space is an honorary biennial competition aiming to highlight best practices and innovations in the creation, transformation, and recovery of public spaces in European cities.
As the first edition to include a dedicated category for Seafronts, this year’s awards recognize the importance and particular challenges faced by coastal cities. This is aligned with the Cultural Regatta, a schedule of activities running parallel to the America's Cup sailing competition in Barcelona. For this edition, the International Jury was presided over by the urbanist architect, landscape, and industrial designer Beth Galí, and made up of Sonia Curnier, Fabrizio Gallanti, Žaklina Gligorijević, Beate Hølmebakk, Manon Mollard, Francesco Musco, and Lluís Ortega. The winners of the 12th European Prize for Urban Public Space will be announced during a ceremony at CCCB on October 29, 2024.
Located in Mexico City, the municipality of Iztapalapa has some of the most densely populated areas within the metropole. Serving a population of 1,800,000 people, many of them with lower incomes, the municipality struggles to provide sufficient public spaces and amenities. In an effort to correct this, the administration set out to take underutilized and abandoned plots of land and transform them for public use. Utopia Estrella is one of these initiatives. Located near Mexico City’s largest water treatment plant, the project combines a socially engaging architectural program with a pedagogical approach to the role of water infrastructures in the larger ecosystem. Designed by Cano Vera Arquitectura, the project has been recognized as the Gold Prize Winner of the Holcim Awards 2023 for Latin America. In a video interview for ArchDaily, Juan Carlos Cano of Cano Vera Arquitectura discusses the impact of this project, its goals, and the unique conditions that led to its development.
Within the framework of implementing green infrastructure projects for water management in the Basin of Mexico, utilizing existing public spaces, La Quebradora Water Park emerges as the first proposal for hydro-urban acupuncture. The project, developed by the team from the Institute of Social Research at UNAM, coordinated by Manuel Perló Cohen and Loreta Castro Reguera Mancera, aims to transform the site's infiltration into a landmark of good water management, public space creation, and strengthening of the social fabric through four levels: infrastructure, park, city, and viewpoint. Addressing part of the water and social issues facing the area, the proposal transforms urban infrastructure into a public and recreational space for the community in a densely populated area with scarce public spaces.
Cities constantly undergo infinite changes, leaving many spaces within the urban fabric forgotten and unused. Historic buildings are refurbished, and adaptive reuse explores new possibilities, but what happens with public spaces? Small interventions using simple resources and innovative solutions are the perfect way to bring these neglected alleys, plazas, and highways back to life and reincorporate them into the city.
Architectural competitions are valuable learning tools, offering architects a unique opportunity to experiment and expand their creative boundaries. By engaging with real-world challenges and receiving critical feedback, participants gain practical experience and a deeper understanding of the profession. Whether conceptual or not, competitions foster innovation, encouraging design professionals to think outside the. This week's curated selection showcases winning competition entriessubmitted by the ArchDaily community, providing architects and architecture students with new perspectives and inspiration for their own practice, be it diploma projects, professional licensing, or commissions.
From an immersive urban park in Seoul, South Korea, to a rural education campus in the Amazon, or a reimagined port in Corsica, this selection highlights projects that have stood out in competitions from around the world. While some of the proposals have been developed by established firms, including KAAN Architecten, ArchiWorkshop, Studio Akkerhuis, or Richez Associés, these competitions have also proven to be an opportunity for emerging designers to showcase their creativity and problem-solving abilities
As part of public ‘open house’ sessions with local communities and agencies, Foster + Partners and Arup have revealed the design for the first 4 stations of California’s High-Speed Rail. This is part of an extensive project, as the new Central Valley stations will serve as models for the design of the next stations planned along the 500-mile-long Los Angeles/Anaheim to San Francisco rail system. The open house sessions represent an opportunity for the public to explore the project, talk with California High-Speed Rail Authority planning experts, and learn more about the high-speed rail infrastructure. The project is under construction, with the first operable line scheduled to be completed between 2030 and 2033.
Evolving theories in urban design seek to reframe how cities are built and experienced. As theory and practice grows more empathetic towards the needs of its diverse stakeholders, queer urban design brings a broad and holistic shift to understanding identity and community in publicly inhabited spaces. The approach challenges traditional - often rigid - methods of city planning by applying principles of queer theory to reflect fluidity and interconnectedness. On occasion of Pride Month 2024, ArchDaily investigates the building blocks of "queer urban design" to influence city planning practices to be more inclusive.
Alarming cases of climate disasters are a constant presence in world news. Last month's floods in southern Brazil gained special attention from heat waves and forest fires to droughts and cyclones. This tragedy, which left over half a million people homeless, was understood to be the result of a combination of factors, including human actions that have devastated ecosystems to create environmentally irresponsible cities.
In this context, the work of Beijing-based architect Kongjian Yu, founder of the landscape architecture firm Turenscape, has gained international visibility and recognition, which included receiving the 2023 Cornelia Hahn Oberlander International Landscape Architecture Prize (“Oberlander Prize”). His "sponge cities" concept, designed to address and prevent urban flooding in the face of accelerated climate change, was adopted as national policy in China in 2013. This approach prioritizes large-scale nature-based infrastructures such as wetlands, greenways, and parks.
In the mountain valleys of China’s Fujian Province, thousands of large, rammed earth fortresses lay abandoned. Once used for both defense and collective housing, the tulou typology is an integral part of the region’s cultural heritage, with 46 of them being recognized by UNESCO as World Heritage Sites. Despite this, the rural communities surrounding them have struggled to find new roles and purposes for these buildings. Going beyond the need for conservation, architect Xu Tiantian of DnA_Design and Architecture set out to develop and adapt this heritage to reintroduce it into community life. The Fujian Tulou | Adaptive Reuse project recently won the Gold Prize of Holcim Awards 2023 for Asia-Pacific, recognized for creating “an exemplary model for building conservation initiatives.”In a video interview for ArchDaily, Xu Tiantian discusses the principles that underpin this initiative and the potential outcomes of adaptive reuse in rural communities.
For cities, hosting an Olympic event represents both an honor, an important opportunity for growth, and a significant challenge. With over 200 nations taking part in the Games, the Olympics are the largest sporting competition in the world. Adapting the public and sporting infrastructure to accommodate this sudden influx of people and the scale of these events runs the risk of misunderstanding the cities’ needs after the closing ceremony, often producing “white elephants” that struggle to adapt to the rhythm and necessities of everyday urban life. Urban transformations are often cited as an advantage of hosting the Olympic Games, as cities are incentivized to invest in their traffic infrastructure, housing, and public spaces. One such example is the city of Paris, which introduced its first metro line on the occasion of hosting the second edition of the Olympic Games in 1900.
When it comes to the venues, however, the issue of adaptive reuse becomes a pressing one, as the architecture is challenged to find solutions to transform, accommodating thousands of people during the Olympics, then scaling down to become a financially sustainable part of a city’s sporting offering. Across the world, several Olympic venues have managed to extend their usability after the closing of the games, opening themselves to the local communities and welcoming a more diverse programming of sports and leisure events. While the high construction costs are often difficult to justify, these venues have become markers of local identity and attractive tourist attractions, extending their use decades after welcoming the Olympic crowds.
Republic Square in Ljubljana holds immense historical and symbolic significance for Slovenia. It is located in the historic center of the city and features a blend of buildings with different designs, scales, and dimensions, together with interconnected open spaces, passages, and underpasses. These elements form a multifunctional complex whose construction lasted more than 20 years and underwent several volumetric and programmatic reconfigurations. Visible from a distance and standing out above the Ursuline Church’s bell tower, two prominent office towers rise as part of this work designed by Edvard Ravnikar, the most prominent Slovenian architect of the second half of the 20th century.
Courtesy of SITELAB urban studio and Field Operations
SITELAB urban studio and Field Operations have revealed a design proposal to reimagine San Francisco’s iconic Powell Street. The street used to be one of the busiest pedestrian corridors in its district and a popular tourist attraction, with cable cars running up and down the street and connecting Union Square and Hallidie Plaza. Across the most popular three-block stretch, the storefronts have become mostly vacant. According to the San Francisco Chronicle, one of the reasons was the Covid pandemic, which led to a further decrease in tourism and in commercial activities. Now a new project led by designers SITELAB urban studio and Field Operations aims to revive the now underutilized transit corridor and to catalyze a renewed interest in the area.
Heatherwick Studio has unveiled the design of a new large-scale glass canopy to become one of the main attractions of Olympia, an ambitious regeneration project aimed at transforming the 138-year-old exhibition halls in London into a global culture and entertainment destination. Originally designed by Sir Henry Edward Coe, Olympia is set to offer visitors a wide range of venues and activities, including two hotels, over 30 restaurants, bars and eateries, a 4,400-capacity live music hall, a theater, and spaces for the Wetherby Performing Arts School, in addition to over 2.5 acres of accessible public spaces. The revival project is co-designed by Heatherwick Studio and SPPARC.
Stefano Boeri Architetti has been declared the winner of the international competition for the redevelopment of a former industrial site in downtown Bratislava. The project includes the transformation of one of the largest abandoned areas in the Slovak capital, with the aim of creating an active new central hub for the city, complete with parks and public spaces, residential units, and a variety of amenities. Stefano Boeri Architetti’s master plan proposal, titled “Urban Oasis,” has been appreciated by the jury for integrating familiar typologies, creating a “European matrix” of medium-density developments organized around accessible public spaces.
