Ключевые слова: ancient, architecture, asia, asian, bridge, building, castle, chi, china, chinese, citadel, city, complex, culture, east, emperor, entrance, forbidden, fort, fortress, gate, heritage, historic, historical, history, ho, hue, imperator, imperial, landmark, majestic, medieval, military, minh, monument, national, old, palace, royal, site, tourism, tower, traditional, travel, trip, vietnam, vietnamese, wall, world,