The Culture and Congress Centre in Lucerne Switzerland (or KKL for Kultur- und Kongresszentrum Luzern) is a multi-functional building with a concert hall that is esteemed for its high-profile acoustics. It was built according to the plans of the architect Jean Nouvel and was inaugurated in 1998 with a concert by the Berlin Philharmonic Orchestra under the direction of Claudio Abbado.
interesting facts about the roof structure:
surface 12’000 square metres (2.9 acres)
weight: 2’400 tons
underside surface: 7000 square metres
materials: steel beams with wood supports, top: copper, underside: aluminum panels
longest roof overhand (north-east corner): 45 metres
withholding elements: up to 160km/h (99mph) winds and heavy snow weights