sentences:  The Virgin of Montserrat is Catalonia's favourite saint, and is located in the sanctuary of the Mare de Déu de Montserrat, next to the Benedictine monastery nestling in the towers and crags of the mountain.The Escolania, Montserrat’s Boys’ Choir, is one of the oldest in Europe, and performs during religious ceremonies and communal prayers in the basilica.The basilica houses a museum with works of art by many prominent painters.