Shortly after the Berlin Wall fell in 1989, Roger Waters decided to celebrate this landmark in the German reunification by erecting a version of The Wall he had built with Pink Floyd a decade prior. On 21 July 1990, the vacant terrain between Potsdamer Platz and the Brandenburg Gate, a location that was part of the former “no man’s land” of the Berlin Wall, received Waters and a plethora of musical guests (Cyndi Lauper, Scorpions, Bryan Adams) to perform a nearly complete version of the rock opera. It stands as one of the largest crowds ever for a concert: 350,000 tickets were sold, and right before the performance started the gates were opened which enabled at least another 100,000 to watch.