The secret bunker beneath Thang Long Imperial Citadel unveiled
For the first time in history, a once-top-secret wartime facility – the General Staff's Secret Bunker has been opened to the public.
THE HANOI TIMES — Hidden beneath the ancient grounds of the Thang Long Imperial Citadel, a UNESCO World Heritage Site in the heart of Hanoi, the bunker offers a rare glimpse into Vietnam’s military history.
In celebration of the 80th anniversary of Vietnam's National Day, the Thang Long - Hanoi Heritage Conservation Center undertook extensive research, restoration and promotion of the historical value of the General Staff's Secret Bunker.
The restoration was carried out with a focus on preserving original elements, avoiding interference with the historical structure, and maximizing the relic’s cultural and educational value. New interpretation methods and technologies were applied to enhance the visitor experience and attract a broader audience, particularly younger generations.
The construction of the bunker began on February 10, 1966, and was completed on June 30, 1966. Photos: Duy Khanh/The Hanoi Times
The bunker was built entirely underground, covering a total area of 37 square meters, and saw its most intensive use in December 1972.
The bunker has only one entrance, with its door made of sturdy iron.
The General Staff's Secret Bunker aims to ensure secrecy, safety, and integrity of all high-ranking military communications during the war against American troops.
It acted as an informational “blood vessel,” closely linking the supreme command with all military branches and battlefronts across the country.
Artifacts of leaders, officers, and soldiers who worked in the bunker are on display.
The types of seals stored in the bunker include the C58 Seal, Top Urgent Seal, High Urgent Seal, Name-Specific Seal (only the person named could open and view it), and seals marking the translation of dates, times, and days.
Envelopes of dispatches sent from the bunker are marked “Confidential.”
The special seals.
Due to its limited size, the tunnel restricts entry to a maximum of 10 visitors at a time to ensure safety.
