The Sukhothai Kingdom — Dawn of Thai Civilization

Around 1238, Thai chieftains overthrew their Khmer overlords and established the Sukhothai Kingdom in the upper Chao Phraya valley of present-day central Thailand. Under King Ramkhamhaeng the Great (r. ~1279-1298), Sukhothai flourished as the first major Thai-speaking state. Ramkhamhaeng is credited with creating the Thai script (adapted from Khmer and Mon scripts), establishing Theravada Buddhism as the state religion, and forging diplomatic relations with China. A famous stone inscription attributed to him describes an idealized kingdom: "In the water there is fish, in the fields there is rice... whoever wants to trade in elephants, trades." Sukhothai's art — characterized by graceful, sinuous Buddha images — is considered the golden age of Thai aesthetics. The kingdom declined in the late 14th century, absorbed by the rising Ayutthaya Kingdom to the south, but its legacy as the cradle of Thai civilization endures. The ruins of Sukhothai are a UNESCO World Heritage Site.