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
Death of Wolfgang Amadeus Mozart life. Beyond the Salieri theory, other theories involving murder by poison have been put forth, blaming the Masons, Jews, or both. One such theory was the work of Mathilde Ludendorff, wife of the German general Erich Ludendorff. William Stafford (1991) describes such accounts as outlandish conspiracy theories, giving supporting reasons. Stafford (1991:56) described the effort to determine what disease killed Mozart: In the parish register, the entry concerning Mozart's death states he died of "severe miliary fever"; – "miliary" referring to the appearance of millet-sized bumps on the skin. This does not name the actual disease. Mozart had health problems