From about the tenth century to the fourteenth century Thailand was known through archeological findings and a number of local legends. The period saw the Khmer domination over a large portion of Chao Phraya basin and the Isan. The expansion of Tai people and culture southwards also happened during the classical era.

Lavo

Main article: Lavo kingdom

220px Wat Phra Prang Sam Yod 001 Classical Era

magnify clip Classical Era

Wat Phra Prang Sam Yod in Lopburi

Around the tenth century, the city-states of Dvaravati coalesced into two mandalas