The Phimai Stone Sanctuary is located in Phimai District, Nakhon Ratchasima (Khorat) Prov ince. This Khmer style sanctuary is considered the largest Buddhist monument in Thailand. In the center of the Phimai Sanctuary stands a large Prang which is made of white lime stone and sandstone. The prang itself is built on a rectangular base which has re-entrant angles at the corners. The building has been extended to the south. Unlike other Khmer monuments in north east ern Thailand which mostly face the east, the main prang of the Phimai Sanctuary faces the south, presumably directed to the main route which runs from the Khmer Kingdom.