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". Mignon: Mignon is an "opéra comique" (or opera in its second version) in three acts by Ambroise Thomas.
Faust