The piece, titled Serenade in C, was found in a Leipzig library. It was written for a string trio and lasts around 12 minutes.

A previously unknown piece of music composed by Wolfgang Amadeus Mozart when he was probably in his early teens has been uncovered at a library in Germany, researchers said Thursday.

A previously unknown piece of music written by Wolfgang Amadeus Mozart has been discovered in Leipzig, the city said on Thursday. The 12-minute piece, "Serenate ex C," is from the collection of Carl Ferdinand Becker and was part of the music collection of the Leipzig City Libraries,

Turns out there’s at least one piece of music by Mozart that has not been studied and performed to death. As The Guardian reports, a previously unknown composition by Mozart has been discovered in a German library.