Designed and delivered by our teams in 2003, we were commissioned to restructure and raise this office building by reopening it to the city and doubling its area. This project is part of a sustainable approach that aims to "rebuild the city on the city". It is a demonstrator of the ability of our teams to completely reinvent a building according to the evolution of its ecosystem, the evolution of techniques, to optimize its heritage development, and guarantee a better quality of life for its occupants. The building is located in the Saint-Denis Landy tertiary center, a very dynamic business center on the outskirts of Paris, whose organization of the 2024 Olympic Games by Paris will boost the already substantial visibility.