The Rollos Site Group, believed to be the beginning of Khmer art, was built during the Angkor Dynasty in the 9th century A.D. and is divided into three sites, namely, the Bakong Temple, the Lolai Temple and the Shenniu Temple. Bakong Temple is the largest and most important temple in the ruins of Rollos. It used to be a large temple in the city center. Its architectural style inherited the influence of Borobudur in Indonesia and was mainly used to worship Linga.