As a part of Thai history building process, Sukhothai was said to be the 'first national capital of the Thai Kingdom
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The existence period of Sukhothai Kingdom, as well as the period of each reign, varies from one record to another.
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In general, the kingdom lasted around 200 years: B.E. 1781 – 1981 (A.D. 1238 – 1438).
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Of this 200 years, it was independent around 140 years, and the remaining 60 years, it was annexed as a part of Ayuthaya Kingdom
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Sukhothai was ruled by nine consecutive kings