The Secret State Archives Prussian Cultural Heritage Foundation is an agency of the Prussian Cultural Heritage Foundation headquartered in Berlin, Germany. A Federal statutory body, it is one of the largest repositories of primary source documents in Germany and spans the history of Prussia, Brandenburg, the House of Hohenzollern and the Prussian Army. Insofar as the agency represents over 400 years of archival work of the former states of Brandenburg-Prussia, including their main roots in the Teutonic Knights, the Archives can be said to cover "nine centuries of European history between Königsberg and Cleves."

The Prussian Cultural Heritage Foundation is a German federal government body that oversees 27 museums and cultural organizations in and around Berlin, Germany. Its purview includes all of Berlin's State Museums, the Berlin State Library, the Prussian Privy State Archives and a variety of institutes and research centers. As such, it is one of the largest cultural organizations in the world, and also the largest cultural employer in Germany with around 2,000 staff as of 2020. More than four million people visited its museums in 2019.