Wolfgang Amadeus Mozart rapidly maturing composer. Wolfgang met Josef Mysliveček and Giovanni Battista Martini in Bologna, and was accepted as a member of the famous Accademia Filarmonica. In Rome, he heard Gregorio Allegri's "Miserere" twice in performance, in the Sistine Chapel, and wrote it out from memory, thus producing the first unauthorized copy of this closely guarded property of the Vatican. In Milan, Mozart wrote the opera "Mitridate, re di Ponto" (1770), which was performed with success. This led to further opera commissions. He returned with his father twice to Milan (August–December 1771; October 1772 – March 1773) for the composition and premieres
Wolfgang Amadeus Mozart and his family had moved from central Vienna to the suburb of Alsergrund. Although it has been suggested that Mozart's aim was to reduce his rental expenses, research shows that by moving to the suburb, Mozart had not in fact reduced his expenses (as claimed in his letter to Puchberg), but merely increased the housing space at his disposal. Mozart began to borrow money, most often from his friend and fellow Mason Michael Puchberg; "a pitiful sequence of letters pleading for loans" survives. Maynard Solomon and others have suggested that Mozart was suffering from depression, and it seems that his