Ключевые слова: abbey, aerial photography, aerial photography by drone, aerial photos, aerial view, airborne imagery, altenberg, altenberg abbey, altenberg cathedral, ancient, architecture, birdseye view, built structure, cathedral, catholicism, christianity, church, cistercians, cross, drone, facade, famous place, germany, gothic architecture, gothic style, grass, green, landscape, medieval, nature, odenthal, old, park, quadcopter, religion, roof, scenics, stone, tower, tree, unmanned aerial vehicle, window,