" Il Divino Boemo"
Mysliveček's first opera, Semiramide, was performed at Bergamo in 1766 (there is no evidence that a putative production at Parma of an opera titled Medea ever took place). His Il Bellerofonte was a great success in Naples after its first performance at the Teatro San Carlo on 20 January 1767, and it led to a number of commissions from Italian theaters. Ever after, his productions would almost always feature first-rate singers in the leading roles. Almost all of his operas were successful until a disastrous production of Armida that took place at the Teatro alla Scala in Milan for the carnival season of 1780. One of the many honors that came to him for his talents as a composer of opera was a commission to provide the music for the opening of a new opera theater in Pavia in 1773 (his first setting of Metastasio's libretto Demetrio).
In 1770 Mysliveček met the young Wolfgang Amadeus Mozart in Bologna.
He was close to the Mozart family until 1778, when contacts were broken
off after he failed to make good on a promise to arrange an opera
commission for Mozart at the Teatro San Carlo in Naples.
Earlier, the Mozarts found his dynamic personality irresistible. In a
letter to his father Leopold written from Munich on 11 October 1777,
Mozart described his character as "full of fire, spirit and life." Source Wikipedia