Located in the center of Quang Tri town, about 2km east of National Highway 1A, Quang Tri Ancient Citadel is a military architectural work built during the reign of King Gia Long (1809) and completed under King Minh Mang (1837). Featuring a characteristic square shape, a perimeter of over 2,000m, walls higher than 4m, and a solid moat system, this place was once the administrative and military center of Quang Tri province under the Nguyen Dynasty, French colonial rule, and the Republic of Vietnam regime.
The Citadel is famous for the 81-day and night battle in 1972, one of the most fierce battles in the Vietnam War. Today, this monument attracts thousands of visitors each year, not only for its historical value but also for its sacred atmosphere and commemorative works such as the monument and museum.

