Sukhothai Kingdom

State · 1241–1458 CE · at its largest around 1352 CE

Early Thai kingdom in the central plains of present-day Thailand, associated with King Ram Khamhaeng and later absorbed by Ayutthaya.

On its lands while it lasted

Yasodharapura (c. 802–1431 CE): Capital of Khmer Empire (802–1431).
Hariharalaya (c. 802–1431 CE): Capital of Khmer Empire (802–1431).
Sukhothai Kingdom (1238–1438 CE): Early Thai kingdom founded in 1238, regarded in Thai tradition as the cradle of Thai civilisation; it was later absorbed by Ayutthaya.
Sukhothai Historical Park (c. 1241 CE): Capital of Sukhothai Kingdom (1241–1438).
Phitsanulok (c. 1241 CE): Capital of Sukhothai Kingdom (1241–1438).
Chiang Saen (c. 1294 CE): Capital of Lan Na Kingdom (1294–1563), Lan Na (1600–1761).
Ayutthaya (1351–1767 CE): Capital of the Siamese kingdom of Ayutthaya, founded in 1351, which became one of the largest and most cosmopolitan cities in Asia before it was destroyed by Burmese forces in 1767.
Lan Xang (1353–1707 CE): Lao kingdom founded by Fa Ngum in 1353, with its early capital at Luang Prabang; it split into rival kingdoms from 1707.
Luang Prabang (c. 1363 CE): Capital of Lan Xang (1363–1560), Kingdom of Laos (1956–1975).
Phnom Penh (1372 CE): Capital of Kingdom of Cambodia (1956–today), People's Republic of Kampuchea (1979–1989).
Fall of Angkor (c. 1431 CE): Angkor was sacked by forces of Ayutthaya around 1431, after which the Khmer court moved south toward Phnom Penh.