Ключевые слова: aachen, aachen cathedral, ancient, architecture, blue, building, catholic, christian, church, city, cultural, day, deutschland, dom, europe, famous, german, germany, gothic, heritage, historic, holy, imperial, imperial cathedral, kaiserdom, landmark, landscape, medieval, nordrhein, old, religion, roman, scenery, sky, stone, street, sunny, tourism, tower, town, travel,