Prasat Thong
| Prasat Thong ปราสาททอง | |||||
|---|---|---|---|---|---|
| King of Ayutthaya | |||||
Idol of deified Prasat Thong in the shrine dedicated to him at the Bang Pa-In Royal Palace, built c. 1872–1876. | |||||
| King of Siam | |||||
| Reign | 1629 – 8 August 1655 | ||||
| Predecessor | Athittayawong | ||||
| Successor | Chai | ||||
| Born | c. 1599 | ||||
| Died | 8 August 1655 (aged approx. 56) | ||||
| Spouse | Sirithida | ||||
| Issue | |||||
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| House | Prasat Thong | ||||
| Father | Okya Sithammathirat | ||||
Prasat Thong (Thai: ปราสาททอง, pronounced [prāː.sàːt.tʰɔ̄ːŋ]; c. 1599–1655; reigned 1629–1655) was the founder and first monarch of the Prasat Thong dynasty, the fourth ruling house of the Ayutthaya Kingdom. Formerly a high-ranking official known as Okya Kalahom (Thai: ออกญากลาโหม), he rose to prominence during the reign of King Songtham by assisting in the suppression of a rebellion led by the king's son, Phra Sisin, in collaboration with the Japanese mercenary leader Yamada Nagamasa. Following a series of succession crises after Songtham's death, he seized power in 1629, briefly installing the infant Athittayawong as a puppet king before executing him and ascending the throne himself. His reign was marked by the reassertion of Siamese authority over Cambodia, though it also saw a weakening of Ayutthaya's control over its northern principalities.