Which opera has more acts, Faust or Mignon?
Faust (opera) Faust is a grand opera in five acts by Charles Gounod to a French libretto by Jules Barbier and Michel Carré from Carré's play "Faust et Marguerite", in turn loosely based on Johann Wolfgang von Goethe's "Faust, Part One". It debuted at the Théâtre Lyrique on the Boulevard du Temple in Paris on 19 March 1859, with influential sets designed by Charles-Antoine Cambon and Joseph Thierry, Jean Émile Daran, Édouard Desplechin, and Philippe Chaperon.
Orion (Lacoste) Orion is an opera by the French composer Louis Lacoste, first performed at the Académie Royale de Musique (the Paris Opera) on 17 February 1728. It takes the form of a "tragédie en musique" in a prologue and five acts. The libretto was begun by Joseph de Lafont, and completed after his death by Simon-Joseph Pellegrin. The plot is based on the Greek myth of Orion.