"Located at the corner of the boulevard du Général Jean-Simon and the allée d'Ivry, uniting Paris and the metropolis below the infrastructures, the project hugs a steep slope by the morphology of its base. On this specific territory, at the articulation of multiple contexts, the building combines density and pleasure of living, preserving the essential balance of the perception of emptiness and fullness. Its fundamental challenges concern the quality and generosity of the housing in its environment and are based on a strong ambition: to take up the challenge of social links and cultural sharing.