A previously unknown piece of music by Mozart has been discovered at a library in western France.
Ulrich Leisinger, head of research at the International Mozarteum Foundation in Austria, said the single sheet of music was "really important".
"His handwriting is absolutely clearly identifiable," he added. "There's no doubt that this is an original piece handwritten by Mozart."
The sheet was found among the archives by staff at a library in Nantes.
Mr Leisinger said the municipal Mediatheque library contacted his foundation to ask for help authenticating the work.