Ключевые слова: ancient, architecture, asia, asian, background, building, capital, citadel, city, culture, day, east, emperor, famous, flag, forbidden, fortifications, fortress, heritage, historical, history, hue, imperial, indochina, landmark, memorial, military, monument, national, old, palace, red, royal, sky, star, tourism, tourist, tower, travel, trip, vietnam, vietnamese, view, wall, war,