The Brandenburg Gate, a monumental gate built in the eighteenth century as a symbol of peace, is Berlin's most famous landmark. During the Cold War, when the gate was located right near the border between East and West Berlin, it became a symbol of a divided city. But when the Berlin Wall fell in 1989, the Brandenburg Gate instantly became the symbol of a reunified Berlin. The Brandenburg Gate is situated at the end of Unter den Linden, a grand boulevard that cuts through the center of Berlin. The gate was originally part of a wall surrounding Berlin and was the main entrance to the city. It is the only gate that remains of this former city wall.