Materialize the changes of society in stone. Promote the existing. And create links in a community spirit. These are three guidelines that guide Cathrin Trebeljahr’s architectural approach. Born in Germany, she grew up in Geneva then studied at the Swiss Federal Institute of Technology in Zurich (EPFZ), before learning the trade alongside the biggest names in the sector, such as Mario Botta in Lugano, Tod Williams and Billie Tsien. in New York or even Bernard Tschumi and Jean Nouvel in Paris. Since 2010, she has been running her own In-Out Architecture agency in Geneva and Paris, with a dozen collaborators, on projects in Switzerland and France.