“The Vatican knew it had a winner on its hands with Allegri’s “Miserere” and, wanting to preserve its aura of mystery and exclusivity, forbade replication, threatening anyone who attempted to copy or publish it with excommunication. But that didn’t stop the teenaged Mozart.

The fourteen-year-old Mozart didn’t see himself as being a music pirate, mind you. He was just doing the thing he so excelled at, with his musical genius and photographic memory, back in the spring of 1770. He and his father Leopold were in Rome, working their way through Italy for the month as the young Wolfgang performed and studied and learned. Their timing was perfect: Rome during Holy Week. This was the only time and place you could hear Allegri’s famous “Miserere mei Deus” being sung. In the Vatican’s Sistine Chapel, to be more exact, as part of the exclusive Tenebrae service on Wednesday and Friday of Holy Week. It was a big tradition; since 1514, a total of twelve Misereres had been chanted/sung at this service. This twelfth one, a setting of Psalm 51, composed by Gregorio Allegri in the late 1630’s for Pope Urban VIII, had become the mainstay, far and away the most popular Miserere. To attend this service and hear this music was a big deal. Visitors, musicians, and travelers would arrange their schedules well in advance to be sure and catch a performance.

Why the big deal? Mystery and inaccessibility have a way of adding cachet to any piece of music, particularly one so strikingly gorgeous, at once austere and lushly inviting. The Vatican knew it had a winner on its hands with Allegri’s Miserere and, wanting to preserve its aura of mystery and exclusivity, forbade replication, threatening anyone who attempted to copy or publish it with excommunication.”