Ключевые слова: architectural, architecture, blue, bridge, building, cathedral, catholic, central, church, city, cityscape, cologne, deutschland, dom, dusk, europe, european, famous, german, germany, gothic, great, hohenzollern, innenstadt, koeln, koln, landmark, martin, metal, night, outdoor, railway, reflection, rhine, rhineland, river, romanesque, saint, sky, skyline, st, steel, sunset, tourism, touristic, tower, travel, twilight, urban, water,