Orizzontale is an architecture collective based in Rome whose primary interest are reactivation processes involving urban scrap. Intercepting places, ideas and things rejected from metropolitan (re)productive cycle, Orizzontale activates collaborative “public acts” in the form of semi-permanent architecture or installations, in which material and immaterial wastes mutually restore each other’s meaning. Since 2010 has been promoting do-it-yourself projects of common relational spaces, giving form to both dismissed and unseen images of the city. These projects represent the ground for experimenting new kinds of interactions between city dwellers and urban commons as well as occasions to test the boundaries of architectural creation process.