On the afternoon of April 26th, at Tang Tho Lau (Archive Pavilion) inside Hue Imperial City, Hue Monuments Conservation Center organized the “Exploring and Promoting the value of the Documentary Heritage: The relief castings on the Nine Dynastic Urns at Hue Imperial Citadel” event in celebration of Vietnam Book and Reading Culture Day 2025.

On the afternoon of November 23rd, a ceremony was held with great dignity at Thai Hoa Palace, Hue Imperial Citadel to inaugurate Thai Hoa Palace and receive the UNESCO Documentary Heritage Recognition Certificate for “The bas-reliefs on the Nine Dynastic Urns at the Imperial Palace of Hue”.

The Nine Dynastic Urns were recognized as a National Treasure in 2012. On May 8, in the capital city of Mongolia, the “Bronze castings on the Nine Dynastic Urns at the Imperial Citadel of Hue” officially became a documentary heritage of UNESCO's Memory of the World Programme for the Asia - Pacific Region.

Eight years ago, on May 19, 2016, the heritage “Poetry and Literature on Hue Royal Architecture” (1802 - 1945) was recognized as a World Documentary Heritage in the Asia-Pacific region by the UNESCO Memory of the World Committee for Asia and the Pacific (MOWCAP).

With unique and significant values in terms of form and informational content, "The Engravings on the Nine Dynastic Urns of Hue Imperial Citadel" was recognized by UNESCO as a Documentary Heritage in the Asia-Pacific region's Memory of the World Program on May 8th. This marks Hue's fourth UNESCO-listed documentary heritage.

At 13:09 on May 8th (local time), in the capital city of Ulaanbaatar, Mongolia, Vietnam's dossier "Bronze castings on the Nine Dynastic Urns at the Imperial Citadel of Hue" was approved and officially became a documentary heritage of UNESCO's Memory of the World Programme for the Asia-Pacific Region.