Forma Orbis. The foundation field of the architecture

The Forma Orbis is understood here as the cartographic representation of the surface of the Earth that makes operable a “foundation Field” for the architecture. In this Field is represented the "becoming" between the figures of the Earth and the figures of the archi-tecture. On the basis of these assumptions, the contribution explores the difference be-tween Ground and Field and analyzes the crisis of the role of Typology for the urban de-sign within the Piranesi’s works. The contribution ends by reading the foundation of Rome both as one of the most archaic event in the western city history and as one of the most actual problem for the foundation of the contemporary city.