Greater Berlin Act

The Greater Berlin Act was passed by the Prussian Parliament on 27 April 1920 and came into effect on 1 October of the same year.

[1] The new Prussian province then termed Greater Berlin acquired territories from the Province of Brandenburg and consisted of the following: The Act increased the area of Berlin thirteen times from 6,572 hectares to 87,810 hectares.

The Act was an important foundation for the rise of Berlin to a cultural centre of Europe in the 1920s.

Originally a mere municipal boundary, it became a demarcation line between occupation zones after 1945 and part of the Iron Curtain after 1949, with the Berlin Wall on some of its length between 1961 and 1990.

Since the Reunification of Germany, it is the border between the German states of Berlin and Brandenburg.