Hindu civilization spread to Siam in early times from about 2nd century A.D. The Hindus set up many colonies in Siam and the most important of them was Dvaravati which ruled from Cambodia to the Bay of Bengal up to the 10th century A.D. when it was overthrown by the Kaundinya kingdom. Numerous excavations have yielded extensive evidence of Indianization and some remarkable piece of art. Because Siam increasingly assimilated Indian art and culture into a local pattern, relics of pure Indian descent are more ancient than those reflecting local influences. One of the most remarkable sites in the center of Siam, is Srideb (Crip-teb), where statues of Hindu deities bearing Sanskrit inscriptions of the 5th and 6th century have been discovered. The ast of Srideb is of excellent quality and provides a link between Indian art and the art of Southeast Asia. Dr. Quartich Wales considered Srideb the oldest known Hindu temple in Southeast Asia.

http://www.asiafinest.com/forum/lofiversion/index.php/t26380.html

Communautés bouddhistes à Sriteb (centre du Siam), Korat, Pra Phathom, Pong Tuk. Ces deux derniers lieux seront englobés par le royaume Môn du Dvaravati.

A Pra Pathon et à Pong Tuk, nous voyons un style (de statuaire) de Buddha se perpétuer jusqu’à la création d’un type nouveau justement qualifié de Môn.(cité par Angkor.wat.online) 

Cœdès, Notes sur qq. sculptures provenant de Srideb (Siam).