Which opera has more acts, Faust or Mignon?
Mignon Mignon is an "opéra comique" (or opera in its second version) in three acts by Ambroise Thomas. The original French libretto was by Jules Barbier and Michel Carré, based on Goethe's novel "Wilhelm Meisters Lehrjahre". The Italian version was translated by Giuseppe Zaffira. The opera is mentioned in James Joyce's "The Dead" ("Dubliners") and Willa Cather's "The Professor's House". Thomas's goddaughter Mignon Nevada was named after the main character.
Idomeneo Idomeneo, re di Creta ossia Ilia e Idamante (Italian for "Idomeneus, King of Crete, or, Ilia and Idamante"; usually referred to simply as Idomeneo, K. 366) is an Italian language opera seria by Wolfgang Amadeus Mozart. The libretto was adapted by Giambattista Varesco from a French text by Antoine Danchet, which had been set to music by André Campra as "Idoménée" in 1712. Mozart and Varesco were commissioned in 1780 by Karl Theodor, Elector of Bavaria for a court carnival. He probably chose the subject, though it might have been Mozart. The work premiered on 29 January 1781 at the Cuvilliés Theatre in Munich, Germany.