The Central Office has amassed a vast collection of documents, records and files detailing the crimes, including the "Röhm Putsch", the "Reichskristallnacht", single executions of foreign workers by the Gestapo, etc. Evidence can be found for practically all of the scenes and series of crimes. Excerpts (copies and microfiche films) from archive material both in and outside Germany can be found, especially from Eastern European archives. Most of this unique documentation has been transferred since April, 2000 to the National Archive, Ludwigsburg branch. The branch is instructed to preserve and keep the documents accessible for historical research and other interested parties entitled to the information. As a part of this the National Archive could participate in the institution of the research unit of the University of Stuttgart in Ludwigsburg.