The archive of the Bayerische Staatsbibliothek consists of various registries and the documentation (BSB-Dok.). The files of the old registries A, B and C, spanning the period from around 1800 to 1971, were transferred to the Bavarian Main State Archive. They are accessible there.
Main State Archive, Court and State Library, holdings: Directorate General of the Bavarian State Libraries:
Holdings of the Main State Archive
The documentation (BSB-Dok.) forms part of the Image Archive. In addition to graphic representations, it contains predominantly photographs documenting the history and development of the Bayerische Staatsbibliothek: Representations of the building, images of events, but also exhibition posters, plans, films and models.
This material can be found in the online catalogue of the Image Archive.