The transformation of Paris under Haussmann is of interest not only due to the fact that it gave the city the aspect that it still has today. Paris became a haussmannien city (with the help of the Third Republic), but it also became the ‘bourgeois city’ par excellence. With Haussmann, ‘the city becomes the institutional place of the modern bourgeois society’1 and, evidently, it is here where the essential interest of the Haussmannien interventions reside. They created a certain type of city, a space devised from the logic of the bourgeoisie, now the predominant class; they imposed a specific spatial model, which remains after Haussmann and the fall of the Empire and conditioned town planning at the beginning of the Third Republic.