Constructed by the German Democratic Republic (GDR, East Germany), starting on 13 August 1961, the wall completely cut off (by land) West Berlin from surrounding East Germany and from East Berlin until it was opened in November 1989.he Berlin Wall. During the early years of the Cold War, West Berlin was a geographical loophole through which thousands of East Germans fled to the democratic West. In response, the Communist East German authorities built a wall that totally encircled West Berlin.