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.
Alessandro Severo Alessandro Severo (Alexander Severus, HWV A13) is an opera by George Frideric Handel composed in 1738. It is one of Handel's three pasticcio works, made up of the music and arias of his previous operas "Giustino", "Berenice" and "Arminio". Only the overture and recitatives (as well as the words) were new. The impresario Johann Jacob Heidegger probably selected the 1717 libretto by Apostolo Zeno, originally written for Antonio Lotti and re-used by many composers thereafter.