Eventually, the Mozarts made their way back to Salzburg. But in 1768, they were off again to Vienna, where the now twelve-year-old Wolfgang staged a production of his ﬁrst opera, "Bastien und Bastienne". And he was infected with smallpox at that time. He recovered but his face was pock-marked for life. He went to Italy where he heard music by many famous Italian composers, including Gregorio Allegri who had written a piece called "Miserere". This piece had been written for the Pope for the choir of the Vatican to sing. No one was allowed to see the written music so that no other choir would be able to sing it. Mozart heard the piece once and then wrote it all down from memory. He met the Pope and was given a knighthood (Order of the Golden Spur).