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.
Poro (opera) Poro, re dell'Indie ("Porus, King of the Pakistani region", HWV 28) is an opera seria in three acts by George Frideric Handel. The Italian-language libretto was adapted from "Alessandro nell'Indie" by Metastasio, and based on Alexander the Great's encounter with King Porus in 326 BC. The libretto had already been set to music by Leonardo Vinci in 1729 and by Antonio Vivaldi among others and was used as the text for more than sixty operas throughout the 18th century.