The Imperial City is a walled enclosure within the citadel of the city of Huế, the former imperial capital of Vietnam during the Nguyễn dynasty. It contains the palaces that housed the imperial family, as well as shrines, gardens, and villas for mandarins. Constructed in 1803 under Emperor Gia Long as a new capital, it mostly served a ceremonial function during the French colonial period. After the end of the monarchy in 1945, it suffered heavy damage and neglect during the Indochina Wars through the 1980s. The Imperial City was designated as a UNESCO World Heritage Site in 1993 and is undergoing restoration.

Huế is the capital of Thừa Thiên Huế province in the North Central Coast region of Vietnam, located near the center of Vietnam. The original site was a Cham city known as Kandarpapura and later as Amarendrapura and was the capital of the Champa Kingdom from 192 to 605. Following the conquest of city in 1307 by Vietnam, it was renamed to Huế. Huế was the capital of Đàng Trong from 1738 to 1775 and of Vietnam during the Nguyễn dynasty from 1802 to 1945. The city served as the old Imperial City and administrative capital for the Nguyễn dynasty and later functioned as the administrative capital of the protectorate of Annam during the French Indochina period. It contains a UNESCO-designated site, the Complex of Huế Monuments, which is a popular tourist attraction. Alongside its moat and thick stone walls the complex encompasses the Imperial City of Huế, with palaces and shrines; the Forbidden Purple City, once the emperor's home; and a replica of the Royal Theater.