Geheimes Staatsarchiv Preußischer Kulturbesitz

The Prussian Privy State Archives (German: Geheimes Staatsarchiv Preußischer Kulturbesitz or GStA PK) is an agency of the Prussian Cultural Heritage Foundation headquartered in Berlin, Germany.

The origins of the Archives can be directly traced back to 1282, when a collection of official papers under the auspices of the Margrave of Brandenburg was first documented. Formal organization of the stocks occurred in 1468, and in 1598 the Elector of Brandenburg appointed Erasmus Langenhain "Registratura Archivorum" to bring systematic order to the sovereign's documents, official records and files. Today's GStA PK traces itself back to this professional tradition.

More information on the Wikipedia page.

The website, in German, is