The Italian outing was longer than the others (1769-1771) as Leopold wanted to display his son’s abilities as a performer and composer to as many new audiences as possible.
In December 1769, Mozart, then age 13, and his father departed from Salzburg for Italy, leaving his mother and sister at home. It seems that by this time Nannerl’s professional music career was over. She was nearing marriageable age and according to the custom of the time, she was no longer permitted to show her artistic talent in public. The Italian outing was longer than the others (1769-1771) as Leopold wanted to display his son’s abilities as a performer and composer to as many new audiences as possible. While in Rome, Mozart heard Gregorio Allegri’s Miserere performed once in the Sistine Chapel. He wrote out the entire score from memory, returning only to correct a few minor errors. During this time Mozart also wrote a new opera, Mitridate, re di Ponto for the court of Milan. Other commissions followed and in subsequent trips to Italy, Mozart wrote two other operas, Ascanio in Alba (1771) and Lucio Silla (1772).