Situated to the east of the Angkor Park the Roluos group of temples were one of the earliest of the Khmer Capital cities; The temples of Hariharlaya; were dedicated to the Hindu gods Shiva and Vishnu. They were highly significant Pre-Angkorian sites founded by King JayavaramanII. Shortly after its founding; the Capital moved to Kulen; due to likely military considerations. The capital returned to the Roluos area within a few years. After the king death in AD850, King Indravaraman continued the building program. The city was the Khmer capital until King Yasovaraman moved it to Phnom Bakheng in AD 905.
At the present time, it is composed by three major temples: Bakong, Lolei and Preah Ko, and tiny Prasat Prei Monti. At both Bakong and Lolei there are contemporary Theravada Buddhist monasteries.
