Which opera has more acts, Einstein on the Beach or Owen Wingrave?
Owen Wingrave Owen Wingrave, Op. 85, is an opera (originally written for a televised performance) in two acts with music by Benjamin Britten. The libretto is by Myfanwy Piper, after a short story by Henry James.
Don Quichotte Don Quichotte ("Don Quixote") is an opera in five acts by Jules Massenet to a French libretto by Henri Caïn. It was first performed on 19 February 1910 at the Opéra de Monte-Carlo.