The Palau de la Música Catalana celebrates its annual Open Day to coincide with the World Music Day festivities around the globe. So visitors can get to know the Orfeó Catalán choirs, singers of the various groups will perform onstage in the Concert Hall every half hour accompanied by pianist Josep Buforn. During the Open Day's five hours (10am-3pm), visitors will have access the Concert Hall (auditorium and second floor), scene of major concerts and events; the Lluís Millet Room, the lush lounge located on the main floor; the Orfeó Catalán Rehearsal Room, a cosy and intimate space where you'll find the very first stone of the Palau; and the Petit Palau. The Orfeó Catalán Documentation Centre offers tours of their facilities, located on the fifth floor of the Palau, where they store documentary collections dating back to the 12th century. You'll also be able to visit the 'Women and Music' exhibition, curated by the Centre itself, in the Palau foyer.