In this paper we ask ourselves what are the material and immaterial layers that make up contemporary public space. Which of them must we take into account in the design of the void, and in what way? The answer to these questions comes from a comparison between the different theories and approaches that have built urban public space over time, sometimes referring to the physical sphere, other times taking more into account the immaterial layers, relationships and behaviors that generate the space. In particular, we will focus on highlighting the points of contact and distance between the urban regeneration programs of the 1990s, with specific reference to the Centopiazze Program in Rome, and contemporary bottom-up design movements such as Tactical Urbanism. With these reflections we propose a vision of the city that contemplates in its stratifications its immaterial part, which compares and adds to the materiality of places with an active role. In the ability to design behaviors, we seek the point of balance between design and spontaneous use of space, defining the forms of the urban designed by the immaterial sphere.
Cianci, M.G., Mondelli, F.P. (2020). L'immateriale che disegna lo spazio. U+D, URBANFORM AND DESIGN, n° 13, 48-59.