In conjunction with the exhibition "Pierre Boulez. Œuvre: Fragment" the Louvre Museum of Paris is organising, along with a number of meetings and publications, a series of about 10 concerts. Alongside a range of masterpieces of 20th century music these concerts will feature a number of new compositions commissioned by the museum from six composers. On 28th November at the Auditorium it will be possible to hear a new piece by Marco Stroppa for chapel choir and viola obbligata (ad libitum), Perchè non riusciamo a vederla ? Cris, appels et clameurs, performed by the vocal group Les Cris de Paris under the direction of Geoffroy Jourdain, Christophe Desjardin, alto.