The Imperial Citadel is a historic complex located in Hanoi, Vietnam. It served as the political center of the country for centuries, particularly during the Ly, Tran, and Le dynasties. The site showcases a blend of architectural styles, reflecting the influences of various periods in Vietnamese history. Designated a UNESCO World Heritage Site in 2010, the citadel features significant structures such as the Flag Tower and the Royal Palace. Visitors can explore its ancient walls, gardens, and archaeological sites, which provide insight into Vietnam's rich cultural heritage and the evolution of its governance.