Unfinished opera in 2 acts (K344, 1779–80) by Mozart to lib. in Ger. by A. Schachtner after F. J. Sebastiani's Das Serail. Prod. in 1838 vers. with extra mus. by J. A. André, Frankfurt 1866, London 1953, Tanglewood 1955. Mozart completed only 15 numbers and did not give the work a title. Plot is similar to Die Entführung aus dem Serail and lib. was probably based on Friebert's operetta Das Serail.