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 stamps designed by T.H.E. Hill, the author of , was presented to the Museum by David Guerra, Berlin veteran and webmaster of the site www.berlinbrigade.com. The stamps splendidly illustrate that even twenty years on, veterans of service in Berlin still regard their service there as one of the high points of their lives. Little is left of the Wall at its original site, which was destroyed almost in its entirety. Three long sections are still standing: an piece of the first (westernmost) wall at the Topography of Terror, site of the former Gestapo headquarters, halfway between Checkpoint Charlie and Potsdamer