Since the late 1960s the process of deindustrialization has accelerated considerably. With a loss of 530,000 manufacturing jobs between 2000 and 2009, in France, it is primarily medium-sized cities that are concerned with the industry concentrated on their territory, often as a single industry. Their reactions, their resilience in the face of deindustrialization are different depending on their history, their specificities. They are subject to the political impetus to multiple scales, their economic life is challenging and sometimes even their urbanity is questionable. Two cities, Gennevilliers and Le Creusot to profiles geographic, economic, industrial and office are interviewed to study different part of the dynamics of these territories ...