As the central state archive of the state of Berlin, the Landesarchiv Berlin holds the written records of Berlin authorities, courts and institutions from various eras as well as a wide range of sources on the city's history. As a result, it possesses an extraordinary wealth of unique documents on the development of Berlin, which are continuously supplemented by regular acquisitions.
In 1991, the Landesarchiv merged with the Stadtarchiv Berlin from the former eastern part of the city, the Büro für stadtgeschichtliche Dokumentation und technische Dienste (Office for Urban History Documentation and Technical Services) and the Verwaltungsarchiv des Magistrats (Administrative Archives of the City Council) to form a new all-Berlin institution. In 2000, the Landesarchiv received further valuable additions through the integration of the archive department of the Landesbildstelle as well as the archive of the International Building Exhibition (IBA). It now also sees itself as an archive of the audiovisual media of the state of Berlin.