Berlin, which was reinstated as the capital of Germany in 1990 after its ideological, political and military division established during the Cold War officially ended, has always been a hotbed of artistic expression. The Berlin Wall’s west-facing side became a canvas, contributing to a vibrant street art scene that exists to this day, both in the form of eye-catching graffiti and in Berlin’s East Side Gallery, the longest open-air gallery in the world. Right after the wall came down, artists from...