We hold vast number of resources on German history ranging from the Middle Ages to the reunification, and the collection is still growing. Half the collection consists of material from the numerous German states, making this library an outstanding place to locate research material for both general and regional German History. Our focus is on primary sources with supplementary guides, bibliographies, reference works and periodicals. For instance we hold several complete sets of series published by national and local record societies such as Archive for Reformation History and the Findbücher zu Beständen des Bundesarchivs going back from 1903 and 1970. The holdings are particular strong in medieval history, religious and reformation history, as well as in 19th century history. Not at least sources for nineteenth-century political history are very extensive including nearly 80 volumes of Otto von Bismarck’s collected works of political writing. Moreover, the library holds an almost complete set of the Monumenta Germaniae Historica (MGH) on open access, which is the most significant collection of medieval sources for German and European history.