The bas-reliefs on the nine bronze urns in Huế Imperial Palace, including 162 motifs and Han characters embossed on the urns in 1835 and completed in 1837 in Huế under the royal order of the emperor Minh Mạng, were placed in the yard of Thế Tổ Temple and have never been moved up to now. This is an original and precious documentary source, which receives the attention of Vietnamese and foreign researchers because it bears the values regarding history, culture, education, geography, feng-shui, medicine and pharmacy, calligraphy. They bear testimony to remarkable bronze casting technique and the craftsmanship used to create these typical and original works. Notably, it is deeply influenced by a once widespread Oriental culture relating to the significance of the number “9” 九 and the casting of nine urns, symbolizing the unification and the long-lasting existence of a dynasty, of which these are the only remaining examples. The bas-reliefs on the nine urns have preserved the values on the social cultural relations and contacts among Viet Nam and other countries in East Asian region.