Which opera has more acts, Owen Wingrave or Mireille?
Owen Wingrave:  85, is an opera (originally written for a televised performance) in two acts with music by Benjamin Britten. Mireille (opera): Mireille is an 1864 opera in five acts by Charles Gounod to a French libretto by Michel Carré after Frédéric Mistral's poem "Mireio".
Mireille