Ключевые слова: ancient, ancients, arch, architecture, balkan, balkans, belgrade, brick, building, built, castle, defense, destination, eastern, entrance, europe, exterior, famous, fort, fortification, fortified, fortress, gate, heritage, historic, historical, history, inner, kalemegdan, landmark, medieval, nobody, old, open, park, ruin, ruins, serbia, serbian, stambol, stone, stronghold, tour, tower, travel, tunnel, wall, walls, yugoslavia, yugoslavian,