The Khmers founded an outpost at Xay Fong near Vientiane. The Champa expansion occurred in southern Laos through 1070. Chanthaphanit, the ruler of Xay Fong, invaded Muang Sua and was accepted as ruler with the departure of the Nan-chao administrators. Though Chanthaphanit and his son had long reigns, the dynasty had troubles with several principalities, leading to Khun Chuang, who may have been a Kammu tribesman, extending his territory to Muang Sua and ruling from 1128 to 1170. The family of Khun Chuang reinstituted the Siamese administrative system of the 7th century. The territory experienced a brief period of Khmer suzerainty under Jayavarman VII from 1185 to 1191. After the town became the center of a localized kingdom in the 13th century, it became known by the Tai name Xieng Dong Xieng Thong, which in 1353 became the capital of Lan Xang. The capital was moved in 1560 by King Setthathirath I to Vientiane, at which time, Xieng Dong Xieng Thong was renamed Luang Prabang, meaning "City of the Lord (Buddha) of Fine Gold", in recognition of the Phra Bang gift received centuries earlier.
