Long-lost Mozart composition discovered in library after decades of obscurity, centuries after his death

German researchers recently discovered a "new" piece by Wolfgang Amadeus Mozart, 233 years after his death.Leipzig Municipal Libraries announced the discovery of the newly-identified composition, originally called "Serenade in C," on Thursday. The manuscript of the composition dates back to around 1780, when Mozart was 24 years old.It was noticed by researchers working on a new edition of the Köchel catalog, which is a formal catalog of Mozart's compositions. The piece will be publishe