Thai history is usually discussed in four periods. The Mahidol University lists the periods as:
- The Sukhothai Period 1238 - 1438 A. D.
- The Ayuthaya Period 1350 - 1767 A. D.
- The Thon Buri Period 1767 - 1782 A. D.
- The Rattanakosin Period 1782 - now A. D.
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