The Magic Flute, K. 620, is an opera in two acts by Wolfgang Amadeus Mozart to a German libretto by Emanuel Schikaneder. The work is in the form of a Singspiel, a popular form during the time it was written that included both singing and spoken dialogue. The work premiered on 30 September 1791 at Schikaneder's theatre, the Freihaus-Theater auf der Wieden in Vienna, just two months before the composer's premature 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.

The Köchel catalogue is a chronological catalogue of compositions by Wolfgang Amadeus Mozart, originally created by Ludwig Ritter von Köchel, in which the entries are abbreviated K. or KV. Its numbers reflect the ongoing task of compiling the chronology of Mozart's works, and provide a shorthand reference to the compositions.