Mozart moved out. After leaving Paris in September 1778 for Strasbourg, he lingered in Mannheim and Munich, still hoping to obtain an appointment outside Salzburg. In Munich, he again encountered Aloysia, now a very successful singer, but she was no longer interested in him. Mozart finally returned to Salzburg on 15 January 1779 and took up his new appointment, but his discontent with Salzburg remained undiminished. Among the better-known works which Mozart wrote on the Paris journey are the A minor piano sonata, K. 310/300d, the "Paris" Symphony (No. 31), which were performed in Paris on 12 and 18 June 1778; and the Concerto for Flute and Harp in C major, K. 299/297c. Vienna 1781: Departure In January 1781, Mozart's opera Idomeneo premiered with "considerable success" in Munich. The following March, Mozart was summoned to Vienna, where his employer, Archbishop Colloredo, was attending the celebrations for the accession of Joseph II to the Austrian throne. For Colloredo, this was simply a matter of wanting his musical servant to be at hand (Mozart indeed was required to dine in Colloredo's establishment with the valets and cooks). He planned a bigger career as he continued in the archbishop's service; for example, he wrote to his father: My main goal right now is to meet the emperor in some agreeable fashion, I am absolutely determined he . I would be so happy if I could whip through my opera for him and then play a fugue or two, for that's what he likes. Mozart did indeed soon meet the Emperor, who eventually was to support his career substantially with commissions and a part-time position. In the same letter to his father just quoted, Mozart outlined his plans to participate as a soloist in the concerts of the Tonkünstler-Societät, a prominent benefit concert series; this plan as well came to pass after the local nobility prevailed on Colloredo to drop his opposition. Colloredo's wish to prevent Mozart from performing outside his establishment was in other cases carried through, raising the composer's anger; one example was a chance to perform before the Emperor at Countess Thun's for a fee equal to half of his yearly Salzburg salary. The quarrel with the archbishop came to a head in May: Mozart attempted to resign and was refused. The following month, permission was granted, but in a grossly insulting way: the composer was dismissed literally "with a kick