Alexanderplatz demonstration
The Alexanderplatz demonstration (German: Alexanderplatz-Demonstration) was a demonstration for political reforms and against the government of the German Democratic Republic on Alexanderplatz in East Berlin on Saturday 4 November 1989. With between half a million and a million protesters it was one of the largest demonstrations in East German history[A] and a milestone of the peaceful revolution that led to the fall of the Berlin Wall and German reunification.
Source: Wikipedia — Alexanderplatz demonstration (CC BY-SA 4.0)