berlin Berlin at night Berlin Cathedral Berliner Dom cathedral city at night germany night bear berlin bear city sign emblem embroidery engraved metal signs silver symbol brandenburg Brandenburger Tor capital classicism column columns gate landmark Quadriga sightseeing street scenery sunlight tourismn Victoria under the linden tre Unter den Linden american BRD concrete DDR east east berlin east side flat Frontier grey historic history inner german border iron curtain mauer memorial peace russian seperate seperation soviet wall west graffitti grafitti urban art city park tourism