The story
It was started in Oldenburg in 1846 under its first president Karl Theodor von Küstner, of the Königliches Schauspiel in Berlin. The Nazi Propaganda Ministry banned it in 1935 and it was not re-founded until 1947. In 1990, the East German Deutscher Bühnenbund merged with the Bühnenverein.
From Wikipedia’s article on Deutscher Bühnenverein, shared under CC BY-SA 4.0.5