The Schola Cantorum of the London Oratory School will sing two performances in San Francisco, both on Sunday, July 28: 11 a.m. Mass at St. Mary’s Cathedral (Archbishop Cordileone as celebrant) and 5 p.m. concert at Mission Dolores Basilica. Founded in 1996, the choir gives Catholic boys the opportunity of a choral education within the state education system from age 7 to 18.