In both mainland and island Southeast Asia, smaller confederacies amalgamate into larger polities. The Dvaravati kingdom of the Mon speakers and the various pre-Angkorian sites associated with the Khmers are the best known on the mainland. The accession of Jayavarman II in the early ninth century marks the beginning of the powerful Angkor dynasty that will control much of the region from the tenth through the thirteenth century. The Shailendras, who control the maritime realm of Shrivijaya in the eighth and ninth centuries, and build the famed Borobudur, are prominent in Indonesia. Sculpture, generally images of Buddhist and Hindu deities, is the dominant art form in Southeast Asia during this period.