The Imperial City in Hue, Vietnam, is a sprawling complex that served as the administrative and ceremonial center of the Nguyen Dynasty from 1802 to 1945. Surrounded by formidable stone walls up to 2 meters thick and a moat, the Citadel encompasses an area of approximately 520 hectares. Its structures, erected according to the principles of geomancy, include palaces, temples, and gardens, reflecting the opulence of the imperial era. Mainly constructed during the reign of Emperor Gia Long and his successors, the site illustrates the grandeur of Vietnam’s last royal dynasty. Devastated by the conflicts of the 20th century, particularly the Tet Offensive during the Vietnam War, the Imperial City has undergone significant restoration. It is recognized as a UNESCO World Heritage Site for its architectural and cultural significance, offering insight into the religious and political life of the period. Visitors to the site can explore the Forbidden Purple City, once exclusive to the emperor and his retinue, and the remaining original halls adorned with meticulous woodwork and traditional Vietnamese motifs.