Khmer Influence
From the 9th to the 11th century, the central and western area of Thailand was occupied by Mon civilization called Dvaravati. The Mon share the same common lineage as the Khmers and settle in southern Burma latter. The Influence of Dvaravati include Nakhon Pathom, Khu Bua, Phong Tuk , and Lawo (Lopburi). Dvaravati was Indianized culture, Theravada Buddhism was remained the major religion in this area.
By the 11th-12th centuries, Mon Influenced over central Thailand. Khmer cultural influence was brought in the form of language, art and religion. The "Sanskrit" language was entered in Mon-Thai vocabulary during the Khmer or Lopburi Period. The influence of this period has affected many provinces in the north-east such as Kanchanaburi and Lopburi. The Architecture in "Angkor" was also constructed according to the Khmers style. The Khmer built stone temples in the northeast, some of which have been restored to their former glory, those at Phimai and Phanom Rung and further cultures are stone sculptures and stone Buddha images. Politically, however, the Khmer cultural dominance did not control the whole area but power through vassals and governors.