Ключевые слова: aerial, architecture, bridge, building, cathedral, catholic, catholicism, christian, christianity, church, city, cityscape, cologne, day, dom, dome, equestrian, german, germany, gothic, heritage, historic, historical, hohenzollern, kaiser, koeln, koln, landmark, landscape, medieval, old, ornament, outdoor, panorama, religion, rhine, river, roman, rooftop, sky, skyline, statue, summer, sunny, tourism, tower, travel, wilhelm,