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A. Just over a kilometre south of Berlin’s Potsdamer Platz, near the left bank of the Landwehr Canal, an extensive, triangular-shaped area of waste ground once separated the neighbourhoods of Kreuzberg to the east and Schöneberg to the west. Known as Gleisdreieck, meaning ‘triangle of rails’, it was formed by the intersection of different railway lines built in the mid-nineteenth century that entered Berlin from the south. Tracks, sheds and warehouses belonging to three old railway stations – Dresdner Bahnhof (1875–1882), Potsdamer Bahnhof (1838–1944) and Anhalter Bahnhof (1839–1952) – are situated on a raised area some twenty hectares in size, at a height of four metres above the surrounding ground level.
B. As the railway infrastructure gradually ceased to be used, the whole area of Gleisdreieck became increasingly run down and abandoned, to the point of being used as a rubbish tip after 1945. Meanwhile, vegetation took over, turning it into a surprising, natural haven in the middle of built-up areas. The closeness of the wall which divided the city of Berlin between 1961 and 1990 also contributed to the fact that Gleisdreieck was for decades clearly identified as no-man’s-land. Only a station of the same name in Berlin’s underground railway system testified to its existence. Shortly before the fall of the Berlin Wall, however, the German Museum of Technology was established there, attracting large numbers of visitors and giving visibility to the site. More importantly, the unification of the formerly divided city gave the location more centrality, at which point it became imperative to identify a purpose for it.
C. After 2006, the State of Berlin put forward the proposal of converting Gleisdreieck into a large urban park that would integrate the different urban zones which converged there. The decades-long isolation of the site, which had formerly presented a problem, now represented an opportunity for joining the southern area of Potsdamer Platz with Kreuzberg and Schöneberg. The creation of the park would trigger one of the biggest urban expansions inside Berlin, all within a framework of multiple uses and social characteristics. It was necessary to stimulate the development of sixteen new hectares of local amenities that would be capable of integrating different generations and social groups in a sustainable way, and in harmony with nature. Following intense discussion with local proprietors and residents, the need to reconcile these goals with the conservation of railway heritage also emerged.
