Inspector General of Bridges and Roads (Ponts-et-Chaussées). A great builder, he imagines the process of decrement arched bridges by cylinders which becomes classic. According to his fundamental idea of mastering the mechanical states of matter in structures, he created the arches of the Villeneuve-sur-Lot bridge, the steelworks in Caen, the Orly hangars, etc. His research on prestressing led to original processes for consolidating and carrying out various projects, such as refit forms, docks, the port of Brest in deep water, prestressed concrete bridges over the Marne. He is honored at the universities of Brussels and Ghent