The Berlin Wall (Berliner Mauer) was a barrier constructed by the German Democratic Republic (GDR, East Germany), with work beginning abruptly on August 13, 1961. Its purpose was to completely cut off democratic West Berlin from both surrounding East Germany and communist East Berlin, effectively imprisoning its own population. The wall running through the city center was over 43 kilometers long and stood 3.6 meters high, part of a massive border fortification system that stretched for more than 100 kilometers.
The Wall was a brutal reality with a tragic human cost. Between 1961 and its fall in 1989, well over 100,000 citizens of the GDR tried to escape to the West. More than 600 of them died in the attempt, either shot and killed by GDR border guards or losing their lives in other ways while trying to cross.
Visually, the Wall was a tale of two starkly different sides. The eastern side, facing into East Berlin, was kept a sterile white and was part of a heavily guarded "death strip" that was impossible for ordinary citizens to approach. The western side, however, became a massive canvas for freedom and protest. Starting in the early 1980s, artists from all over the world began to cover it in colorful murals, political statements, and graffiti, transforming a symbol of oppression into a world-famous monument to defiance.