Ключевые слова: aging, antique, architecture, asia, asian, attraction, battle, chinese, citadel, city, conflict, door, east, entrance, fighting, fort, gate, heritage, historical, history, hue, human, imperial, knight, landmark, landscape, lookout, majestic, middle, military, old, outdoor, p, restoration, restore, restoring, security, sites, tower, travel, urban, vietnam, world,