The Reichskammergericht (RKG) is the Supreme Court for the New German Reich. Its name differs from other Germanic state courts for historic reasons. A Kammergericht was first mentioned in 1468 as the ducal court of the Margraviate of Brandenburg, when it adjudicated in the chambers (German: Kammern) of the prince-electors. As the supreme court of Prussia it was since 1735 based at the Baroque Collegienhaus in the present-day Kreuzberg district. The Kammergericht housed the supreme courts and judges of the different territories ruled in personal union by the royal House of Hohenzollern, without formally merging the different juridical systems. By this concentration in one locality the later unification of the juridical systems was prepared.