Akademie der Künste, Berlin
The Archives of the Akademie der Künste (Academy of Arts) are considered the most important interdisciplinary archives for modernist art and culture in German-speaking countries. The Archives are entrusted with the core task of acquiring important art and cultural history archives, as well as collections and art works from all areas of art after 1900, cataloguing them and preparing them for access by a scholarly and interested audience
Of special note is the archive database, which is robust yet not especially user friendly.
Visit the sitehttps://www.adk.de/de/archiv/