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.
Harold or the Norman Conquest Harold, or the Norman Conquest is an opera in four acts with music by the British composer Frederic H. Cowen with a libretto by Edward Malet, edited by Frederic Edward Weatherly, adapted into the German by L.A. Caumont, and first performed at Covent Garden, London on 8 June 1895.