The “Architectes du Patrimoine” (Heritage Architects) in France take an important part in advices and knowledge transmissions toward public communities. In this case, the city of Vaison la Romaine, was helped by the “architecte des bâtiments de France” for a public housing project just in view of Vaison old town. These advices allowed to consider a new urban qualification of this part of the city. This review was published in “La Pierre d’Angle” on april 2007.