Which opera has more acts, Genoveva or Moses und Aron?
Moses und Aron Moses und Aron (English: "Moses and Aaron") is a three-act opera by Arnold Schoenberg with the third act unfinished. The German libretto is by the composer after the Book of Exodus. Hungarian composer Zoltán Kocsis completed the last act, with Schoenberg's heirs' permission, in 2010, but as of 2014 "Moses und Aron" was almost always performed as Schoenberg left it in 1932, with only two of the planned three acts completed.
The Demon (opera) The Demon (Russian: Демон ) is an opera in three acts (six scenes) by Russian composer Anton Rubinstein. The work was composed in 1871. The libretto was by Pavel Viskovatov, based on the poem of the same name by Mikhail Lermontov.