The Municipality asked to realize a light roofing system in Piazza Gramsci, the main city-center square redesigned by Dominique Perrault in 2004. Our proposal was a ultra thin layer with the same geometry of the green square opposed to the church of Sant’Ambrogio. The roof creates a shaded rest area and a shelter for small events. The steel white painted structure, can be disassembled and easily transported. Small trees will be planted in large stainless steel pots and wooden benches will define the external perimeter of the square.