The sacred stupa is in the compound of Wat Phrathat Phanom Woramahawihan. It is revered. Setthathirath of Lan Xang. It is used to house the Buddha’s breast bones. The architecture of the Phra That is found in the architecture of Khmer castles. It is 53.60 metres high and 12.33 metres wide. The site has been restored several times by the Fine Arts Department. An annual celebration is held from the 10th day of the waxing moon to the 1st day of the waning moon of the 3rd lunar month