The present legal status of Berlin after the conclusion on September 3, 1971 of the Quadripartite Agreement between France, the Soviet Union, the United Kingdom, and the United States can only be understood in terms of its own historical development and the context of the international politics of the 1960s. Although any legal and political analysis of divided Germany and Berlin must take into account a period of history dating back to the 1940s, it is assumed here that the essential facts are sufficiently well known to serve as a background for the following analysis.