The Auschwitz-Birkenau museum in Poland has bought 81 musical scores once played by the camp's prisoner orchestra, Agence France-Press reported.

The scores, which belonged to an anonymous Polish collector, include works by Verdi, Josef Rixner, Carl Robrecht, Heinrich Strecker and Franz von Suppé. Many are handwritten and bear the seal of the camp, a museum spokesman said. The scores are signed by prisoners who were in the orchestra, using their inmate numbers.