Ayutthaya Kingdom

State · 1352–1768 CE · at its largest around 1600 CE

A Siamese kingdom founded around 1351 by U Thong on an island in the Chao Phraya River, which absorbed Sukhothai and became a major trading power before Burmese armies destroyed its capital in 1767.

On its lands while it lasted

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.
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.
Donwun (c. 1363 CE): Capital of Hanthawaddy Kingdom (1363–1369).
Bago (c. 1369 CE): Capital of Hanthawaddy Kingdom (1369–1539), First Toungoo Empire (1539–1599).
Taungoo (1510 CE): Capital of First Toungoo Empire (1510–1539).
Bayinnaung (1516 CE – 1581 CE): King of Toungoo Burma who built what was probably the largest empire in the history of Southeast Asia, including Ayutthaya and Lan Na.
Vientiane (1560 CE): Capital of Lan Xang (1560–1707), Kingdom of Laos (1956–1975), Communist Laos (1976–today).