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Wiki information Sourigna:
Sourigna Vongsa was the last king of Lan Xang and during his period, it considered the golden age of Laos. He ascended to the throne in 1637.
The Kingdom of Champasak or Bassac, was in 1713 proclaimed a Lao kingdom under Nokasad, a grandson of King Sourigna Vongsa, the last king of Lan Xang; and son-in-law of the Cambodian King Chey Chettha IV. Bassac and the neighboring principalities of...