The Reinvented City reflects on externity, the principal feature of a reinvented city. Three fundamental trends of the city are investigated, 'discomposed', 'generic' and 'segregated' phenomena with the loss of the city as a space of social interaction and communication. The interpretative categories of externity are the intermediate spaces, the counterspaces, the void, the edge, the territory and the environment, places on which to base the future city project. Important questions are posed: What is the true public sphere in contemporary societies? What is the contemporary public space corresponding to it? In what way can the city project construct contemporary public space?