Of the substantial volume of the extension, the only part visible initially is the light, delicate pavilion with entrance and cash desk, harmonising with the U-shape of the old building. From here, stairs lead down to the lower level. The room for temporary exhibitions and an auditorium stretch underneath almost the entire new forecourt. Walkable glass areas establish a connection with the outside and allow daylight to penetrate into the exhibition room. The entrance area is illuminated by Lightcast downlights for low-voltage halogen lamps to provide glare-free, brilliant light.