Ban Phu Citadel

Ban Phu Citadel (Thanh Ban Phu) is a historic earthen citadel located in Ban Phu Village, Noong Het Commune, Dien Bien District, Dien Bien Province, northwestern Vietnam, about 8 km from Dien Bien Phu City. Built between 1758 and 1762 by peasant leader Hoang Cong Chat as a military base and administrative center, it features rammed-earth walls, gates and moats. Recognized as a National Historical Relic, it preserves 18th-century military architecture and local history.

Visitors can expect an open-air historic site set in a rural valley surrounded by rice fields and villages. The citadel consists of preserved rammed-earth ramparts, restored gates, moat traces and interior open ground with commemorative steles and shrines dedicated to Hoang Cong Chat. Information boards explain the layout and history. The site is quiet, largely undeveloped, suitable for walking, photography and learning about 18th-century military construction.

Built between 1758 and 1762 by Hoang Cong Chat, leader of a major 18th-century peasant uprising during the Le-Trinh period. He established the citadel as a military stronghold and administrative center for the Muong Thanh region, controlling the northwestern frontier. The earthen fortress with walls, gates and moats reflects contemporary military architecture. It was recognized as a National Historical Relic in 1981.

The citadel is a cultural landmark for Dien Bien Province, associated with local Thai ethnic communities and the legacy of Hoang Cong Chat, who is venerated locally. Annual commemorative activities and offerings at the temple inside the citadel reflect continued community respect. It illustrates traditional earthen construction techniques and the historical settlement of the Muong Thanh valley.