The Boys of St. Paul's Choir School are a group of boys, between fourth- and eighth-graders, who sing soprano in the choir of the Church of St. Paul in Harvard Square in Cambridge, Massachusetts, outside Boston. Despite the Vatican's Instruction on Sacred Music and Sacred Liturgy, De musica sacra (1958), which declared that every effort should be made that city center churches have their own boys' choir school, the school is currently the only one in the U.S. associated with the Catholic church. The school was founded in 1963, in response to the Vatican instruction, with 25 ch...