Among Hue’s traditional craft villages, the bronze-casting craft in the formerly Phuong Duc Ward (now Thuan Hoa Ward) is renowned for the skill, patience, and dedication of artisans.

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.

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.