Ayutthaya Kingdom
Mandala system

Ayutthaya politically followed the mandala system, commonly used throughout Southeast Asia kingdoms before the 19th century. In the 17th century, the Ayutthaya monarchs were able to frequently appoint non-natives as governors of Ayutthaya-controlled towns and cities, in order to prevent competition from its nobility. By the end of the Ayutthaya period, the Siamese capital held strong sway over the polities in the lower Chao Phraya plain but had a gradually looser control of polities the further away from the capital at Ayutthaya. The Thai historian Sunait Chutintaranond notes, "the view that Ayudhya was a strong centralized state" did not hold and that "in Ayudhya the hegemony of provincial governors was never successfully eliminated."
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