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.
Boyarina Morozova (opera) Boyarina Morozova (Боярыня Морозова) is a 2006 choral opera by Rodion Shchedrin based on his own libretto on the story of Boyarina Morozova (d.1675), from the account of archbishop Avvakum and inspired by the painting "Boyarina Morozova" by Vasily Surikov.