Berlin Hauptbahnhof fall of the Berlin Wall in 1989, city planners began work on a transport plan for reunified Berlin. One element of this became the "Pilzkonzept" (mushroom concept), in which a new north-south railway line intersecting the Stadtbahn was to be constructed. The name derived from the shape formed by the new line and existing lines, which vaguely resembles a mushroom. In June 1992 the federal government decided that the new station should be built on the site of Lehrter Bahnhof. While close to the centre of Berlin and government buildings, the area was still not heavily populated. The following year,
Berlin Wall graffiti art kept blank because people were not permitted to get close enough to the eastside of the wall to paint anything. The Berlin Wall was one of the largest canvas in the world. Much of the artwork was not claimed by artists and remains anonymous. Because the wall was open to everyone, there were no restrictions on what artists could put on the wall. Over the past 30 years since the collection of artwork was started, much of the controversial artwork has been removed from the wall. Almost all of the wall has been removed and it only exists in places