General secretariat of the new towns, Paris, 1971-72. J.Prouvé consultant engineer for the curtain walls. G.Autran and M.Macary architects. The curtain wall of this building was treated so as to provide continuity of the envelope both horizontally and vertically, creating the effect of a solid box placed on a glass plinth. To obtain this effect, the curtain wall was designed as a flat surface, with hardly noticeable joints having round corners. #jeanprouve #jeanprouvé #prouve #prouvé #70sarchitecture #architecture #70s