View over river Rhine to old town with cathedral and Great St. Martin church at night, Cologne, North Rhine-Westphalia, Germany

metropolis sight unesco world cultural heritage nobody cityscape architecture europe city cathedral unesco hohenzollern bridge north rhine westphalia hohe domkirche st peter und maria landmark gothic cologne bridge building exterior church koeln old town urban scene bridge landmark outdoors koelner dom night hohenzollernbruecke cologne cathedral romanesque national landmark great st martin church local landmark city rhine railway bridge germany illuminated