"The Kammergericht (KG) is the Oberlandesgericht, the highest state court, for the city-state of Berlin, Germany. As an ordinary court according to the German Courts Constitution ...
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Act (Gerichtsverfassungsgesetz), it deals with criminal and civil cases, superior to the local Amtsgerichte and the Landgericht Berlin. Its name differs from other state courts for historic reasons; it is the only court called Kammergericht in Germany." - (en.wikipedia.org 11.08.2021)