The Choir of the Westminster Abbey

VATICAN CITY, Rome — It has been reported that the Sistine Chapel Choir, whose boys and men sing for the pope at all his Masses, was scheduled to perform with an eminent choir group on Friday.

The Westminster Abbey Choir, the world-renowned chorus that performed at last year’s wedding of Prince William and Kate Middleton, were to join the Sistine singers at a special papal Mass on Friday in St. Peter’s Basilica, a historic event seen as a perfect symbol of Christian harmony after centuries of discord.