Under the reign of King Sourigna Vongsa (1637–1694) Lan Xang experienced a fifty seven-year period of peace and restoration.^[45] During the period the Lan Xang sangha was at the apex of power, drawing monks and nuns for religious study from throughout Southeast Asia. Literature, art, music, court dance experienced a revival. King Sourigna Vongsa revised many of the laws of Lan Xang and established judicial courts. He also concluded a series of treaties which established both trade agreements and boundaries between the surrounding kingdoms.^[46]

In 1641, Gerritt van Wuysthoff with the Dutch East India Company made formal trade contacts with Lan Xang. Van Wuysthoff left detailed European accounts of trade goods, and established Company relations with Lan Xang via Longvek and the Mekong.^[46]

When Sourigna Vongsa died in 1694, he left two young grandsons (Prince Kingkitsarat and Prince Inthasom) and two daughters (Princess Kumar and Princess Sumangala) with claims to the throne. A succession dispute took place where the king's nephew Prince Sai Ong Hue emerged; Sourigna Vongsa's grandsons fled into exile in Sipsong Panna and Princess Sumangala to Champasak. In 1705, Prince Kingkitsarat took a small force from his uncle in Sipsong Panna and marched toward Luang Prabang. Sai Ong Hue's brother, the governor of Luang Prabang, fled and Kingkitsarat was made crowned as a rival king in Luang Prabang. In 1707 Lan Xang was divided and the kingdoms of Luang Prabang and Vientiane emerged.