51N4E: How To Not Demolish a Building @archleague
51N4E: How To Not Demolish a Building  @archleague
Uploaded May 2023 | Updated September 2026, 1 week ago
In this video, the Belgian collective 51N4E (named after the coordinates of the city where they are based) presents their work transforming Brussel's former World Trade Center into a program neutral tower that vertically mixes residential, hospitality, office, and public spaces while remaining flexible for future use. The presentation, given by Olivier Cavens and Dieter Leyssen, includes a detailed look into the firm’s strategies for reusing as much of a building’s materials as possible, including turning the building site into a marketplace to distribute the goods mined from the structure. 

The presentation was followed by a conversation with Elisa Iturbe, an assistant professor at The Cooper Union. Cavens, Leyssen, and Iturbe spoke about dealing with the legacy of modernism, moving towards a system in which reuse is the standard, and how to deal with plumbing when converting offices into residential spaces.
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The Architectural League |

51N4E: How To Not Demolish a Building

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