Brussels is well known for its performing arts scene, with the Royal Theatre of La Monnaie and the Kaaitheater among the most notable institutions. The Kunstenfestivaldesarts, an international performing arts festival, is organised every year in May in about twenty different cultural houses and theatres throughout the city. The King Baudouin Stadium is a concert and competition facility with a 50,000 seat capacity, the largest in Belgium. The site was formerly occupied by the Heysel Stadium. Furthermore, the Center for Fine Arts (often referred to as BOZAR in French or PSK in Dutch), a multi-purpose centre for theatre, cinema, music, literature and art exhibitions, is home to the National Orchestra of Belgium and to the annual Queen Elisabeth Competition for classical singers and instrumentalists, one of the most challenging and prestigious competitions of the kind. Studio 4 in Le Flagey cultural centre hosts the Brussels Philharmonic. Other concert venues include Forest National/Vorst Nationaal, the Ancienne Belgique, the Cirque Royal/Koninklijk Circus, the Botanique and Palais 12/Paleis 12. The Jazz Station in Saint-Josse-ten-Noode is a museum and archive on jazz, and a venue for jazz concerts.