This operation was exclusively concerned with facades and
roofs of the Colbert hotel, labelized Historic Monument, in center of Paris. The studies were
realized from archive and historic research, to design details of profiles of mouldings, and woodwork windows.
To substitute composite with slate roofing, ciment rendering with plaster coating, plastic with woodwork windows, all exterior finishings were modified, in the respect of this old building, close to Notre Dame de Paris.