 Due to its special status, East Berlin was originally not counted as a "Bezirk".In 1961, after the construction of the Berlin Wall, East Berlin came to be recognised in GDR administration as the "Bezirk Berlin", though it retained a special status until the adoption of the revised 1968 Constitution.The "Bezirke" (with the exception of Berlin, which consisted of a single municipality) were subdivided into rural districts ("Landkreise") and urban districts ("Stadtkreise")