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 population also rose to 4 million, making it the largest city in Germany.

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.