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.

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Urban Radicals is a design collective based in London, founded in 2019 by Era Savvides and Athanasios Varnavas. The practice operates at the intersection of multiple disciplines, exploring public space and the notion of collectivity across a variety of scales, contexts and design expressions. One of Archdaily's Best New Practices of 2021, Urban Radicals shrinks and grows organically through the projects, dissolving the boundaries between diverse fields of knowledge and circumventing traditional office structure to integrate a multiplicity of perspectives within architecture.

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The London Festival of Architecture (LFA), the world’s largest annual architecture festival is returning for its 13th edition this summer, transforming the city's neighborhoods into a public display of installations, exhibitions, talks, and special events. Following two years of digitalized editions, this year's LFA falls under the theme of ‘act’, and will see a return of physical events alongside digital realms across the capital.

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As our world evolves at an unprecedented pace, the challenges that come with it are becoming more and more complex. The questions faced by the cities and networks of our global world, the physical and virtual environments where our evolution takes place, are making architecture more relevant than ever. 

The issues of the built environment are no longer exclusive to the incumbents who build and design it and have become transversal questions in our society. From the citizens who question the quality of their public spaces to the self-trained builder erecting a tiny house in the woods, to the homeowners using an app to codesign their interiors during lockdown, we want to have a saying and we want to take action. Why does architecture have to be so uncertain, so distant? 

The technical needs of the construction of bridges many times guide the development of the design itself. However, architecture is never put aside, rather the opposite. The aesthetics of bridges that we collect in this article are the result of an intense, demanding, and stimulating dialogue between architecture and engineering, where the search for solutions only ends when both disciplines are fully satisfied.

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