When the provenance has been clarified unequivocally and it has been established that the book was expropriated, the Bayerische Staatsbibliothek returns Nazi loot to the heirs or the successor organisations with as little red tape as possible. Between 2006 and 2018, 575 volumes could be restituted to 21 institutions and private persons. The stolen items predominantly came from Jewish, socialist and Masonic collections, but also from libraries of political opponents of the Nazi regime.