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.
Arlecchino (opera) Arlecchino, "oder Die Fenster" ("Harlequin, or The Windows", is a one-act opera with spoken dialog by Ferruccio Busoni, with a libretto in German, composed in 1913. He completed the music for the opera while living in Zurich in 1916. It is a number opera written in neo-classical style and includes ironic allusions to operatic conventions and situations typical of the late 18th and early 19th centuries. It even includes a parody of a duel.