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.
Maître Péronilla Maître Péronilla is an opéra bouffe in three acts of 1878 with music by Jacques Offenbach. The French libretto was by the composer with Charles-Louis-Étienne Nuitter and Paul Ferrier.