Staatsarchiv preserves mostly unique and large parts of medieval handwritten documents, but some documents related to the city of Zürich are still housed at the Haus zum Rechberg at Neumarkt, Zürich [REF].
The archival holdings date back to 853 AD, as Zürich was the imperial Pfalz Turicum, thenafter an imperial city, and a federal center of the Reformation in Zürich.