Politisches Archiv des Auswärtigen Amts

English The Political Archive of the Foreign Office.

Founded in 1920 and received its present name in 1924, and covers records since the founding of the North German Federation in 1867.

More information on the German Wikipedia page [http://de.wikipedia.org/wiki/Politisches_Archiv_des_Ausw%C3%A4rtigen_Amts

The website, in German, is