Monday demonstrations in East Germany
The Monday demonstrations (German: Montagsdemonstrationen in der DDR) were a series of peaceful political protests against the government of the German Democratic Republic (GDR). The demonstrations began in Leipzig on 4 September 1989, starting the Peaceful Revolution in the GDR: the fall of the Berlin Wall, the collapse of the government, and German reunification.
Source: Wikipedia — Monday demonstrations in East Germany (CC BY-SA 4.0)