Potsdam, Italy
The Brandenburgisches Landeshauptarchiv (Brandenburgian State Main Archive; acronym BLHA) is the central state archive for the State (Land) of Brandenburg. It is located in Potsdam. Records cover the Land of Brandenburg and its predecessors, back to the 10th century.
Listen to the audio guide for Brandenburgisches Landeshauptarchiv Free on WIP — starts by itself when you arrive, even with the screen off