#OTD in 1791.
The first performance of Mozart's opera The Magic Flute takes place two months before his death.
Still a staple of the opera repertory, its popularity was reflected by two immediate sequels, Peter Winter's Das Labyrinth oder Der Kampf mit den Elementen. Der Zauberflöte zweyter Theil (1798) and a fragmentary libretto by Johann Wolfgang von Goethe titled The Magic Flute Part Two.
https://en.wikipedia.org/wiki/The_Magic_Flute
Die Zauberflöte at IMSLP:
https://imslp.org/wiki/Die_Zauberfl%C3%B6te,_K.620_(Mozart,_Wolfgang_Amadeus)