The MAXXI design goes beyond the concept of the building-museum. The complexity of the volumes, the curving walls, the variations and intersections of the levels determine a very rich spatial and functional configuration that visitors may pass through via ever different and unexpected routes. Multiple environments coexist in a sequence of galleries illuminated with natural light filtered via a special roof system. The large full height atrium houses the reception services and leads into the auditorium, the galleries destined for the permanent collections, the exhibitions and the spaces devoted to the cafeteria and the bookshop.