Visoun (Vixoun also Visunarat or Vixounarath) was the king of Lan Xang from 1500 until 1520.

He was appointed as Governor of Vientiane in 1480 and as Chief Minister with the title of Phya Sena Muang in 1491 with the reign name of Visoun (Lightning).

His reign was prosperous and peaceful with a large number of shrines and monuments being constructed, including the Maha Vihara of Wat Visoun, which he built to house the palladium of Luang Prabang, the Phra Bang, which had been at Vientiane since 1359.

A number of important religious texts and literary works were composed or translated into Lao during his reign.

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