Mozart Idomeneo KV 366 Dramma per musica in three acts Vocal Score"Idomeneo" (KV 366), first performed on January 29, 1781 in Munich's Cuvillis Theater, is Mozart's second opera for the Munich court after the opera buffa "La finta giardiniera" from 1775. The subject matter of the opera (Idomne by Antoine Danchet) and its transformation into a libretto was laid down in written instructions, the unfortunately lost plan, as it was called in correspondence between father and son. The appendix to the Brenreiter piano