Bastien und Bastienne, KV 50 ; K⁶.46b "Bastien and Bastienne"

Bastien und Bastienne was one of Mozart's earliest operas, written in 1768 when he was only twelve years old. It was allegedly commissioned by Viennese physician and 'magnetist' Dr. Franz Mesmer (who himself would later be parodied in Così fan tutte) as a satire of the 'pastoral' genre then prevalent, and specifically as a parody of the opera Le devin du village by Jean-Jacques Rousseau. The German libretto is by Friedrich Wilhelm Weiskern, Johann Heinrich Friedrich Müller (de) and Johann Andreas Schachtner, based on Les Amours de Bastien et Bastienne by Justine Favart and Harny de Guerville. After its supposed premiere in Mesmer's garden theater (that is only corroborated by an unverified account of Nissen), it was not revived again until 1890. It is not clear whether this piece was performed in Mozart's lifetime. The first known performance was on 2 October 1890 at Architektenhaus in Berlin.