Ключевые слова: ancient, arch, architectural, architecture, art, building, buildings, cathedral, catholic, catholicism, christ, christian, christianity, church, city, cologne, culture, dom, dome, domkirche, europe, european, exterior, famous, german, germany, gothic, heritage, historic, history, klner dom, koeln, koelner, koelner dom, koln, landmark, majestic, medieval, old, religion, religious, sightseeing, sky, structure, tourism, tower, travel, urban,