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

Wat Phra Prang Sam Yod in Lopburi

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