Berlin is one of the capitals of street art, walk around anywhere. The graffiti culture here boasts recognized names worldwide: Os Gemeos, Banksy, Kripoe ... all found on the streets. But that's just a sample. Unknown artists have shaped the history of Berlin and Europe throughout the city making it possibly the most "grafitted" world. Part of the Western Wall was painted by the urban art collective, enriched by Turkish immigration and anarchist activists (remember the German anarchist history with the RAF) from the 80s. So the fall of the wall opened a new area that needed to be filled in and before then you could only watch a huge gray wall.