After the Nazis took power in Germany, on March 21, 1933, a meeting known as "Potsdam Day" took place in Potsdam.

An excerpt from the article 24 facts about Potsdam

A Reichstag meeting was held in the garrison church, during which President Paul von Hindenburg entrusted the NSDAP leader with the mission of forming a new government. The agreement concluded with a symbolic handshake was broadcast by radio throughout Germany.