Many factors have worked against an understanding of the genesis of Die Zauberflöte. Few of the composer’s letters mention it. The work has no single dramatic or operatic model. Only a couple of sketches and drafts survive, and the autograph score is relatively free of significant compositional changes. Mozart did not live to see a revised production. The gaps have traditionally been filled with speculations and false histories: the claim that Karl Ludwig Giesecke was a co-author (he wasn’t); an assertion that the text in the libretto and score was not original (it is); a hypothesis of the creators’ change of plans mid-stream, leading to discontinuities between Acts 1 and 2 (this does not hold up); and endless theories of planned symbolism and allegory (mostly wild beyond credibility). But there is evidence of the opera’s creation in the libretto and its construction; in the autograph score; in surviving material from early performances; and in stage directions and other scenic clues. The picture that emerges suggests an opera that was much less stable than has been assumed, and of a work that underwent revision just like most stage works of the late eighteenth century.