The assiduous researcher Michael Lorenz has found evidence that Mozart was approached in 1791 by a playwright and the director of the Hofteather to write music for a new comedy, Er mengt sich in Alles.
This was Mozart’s most productive year – Magic Flute, last piano concerto, clarinet concerto, Ave verum corpus, Requiem. he was no longer desperate for money and had begun paying off debts.
The play premiered in August, apparently without Mozart’s involvement. In September he fell ill. In December he died.
Read the new evidence here.