The building is organized in three overlapping volumes whose rotation among them has been suggested by the geometry of the buildable lot. His overall appearance is that of a glass box protected by a translucent metallic filter, which screens the light and views. However, from the inside the metal façade virtually disappears. The view of the environment from the offices is absolute. The metal horizontal slats prevent the direct sunlight into the building. The use of arcaded structure, with props only in façade allows open plants that are organized through two vertical cores, what allows great versatility of use and partitioning over time. The building is situated in El Raval, an area of the old town of Barcelona very distorted by bombing during the civil war. The new building has to be a driving force of renewal in an architecturally and socially degraded area.