Chancellor of Germany was usually held by Archbishops of Mainz. The title was, at times, used in several states of German-speaking Europe. The modern office of chancellor was established with the North German Confederation, of which Otto von Bismarck became "Bundeskanzler" (meaning "Federal Chancellor") in 1867. With the enlargement of this federal state to the German Empire in 1871, the title was renamed to "Reichskanzler" (meaning "Chancellor of the Realm"). With Germany's constitution of 1949, the title of "Bundeskanzler" was revived. During the various eras, the role of the chancellor has varied. From 1867 to 1918, the chancellor was the only responsible minister
Iron Curtain and West German Chancellor Helmut Kohl convinced Gorbachev to drop Soviet objections to a reunited Germany within NATO in return for substantial German economic aid to the Soviet Union. There is an Iron Curtain monument in the southern part of the Czech Republic at approximately . A few hundred meters of the original fence, and one of the guard towers, has remained installed. There are interpretive signs in Czech and English that explain the history and significance of the Iron Curtain. This is the only surviving part of the fence in the Czech Republic, though several guard towers and bunkers