Roluos (Khmer: រលួស) is a Cambodian archeological site about 13 km east of Siem Reap along NH6. Once it was the seat of Hariharalaya, first capital of Khmer Empire north of Tonlé Sap (as the first capital in the strict sense of the term could have been Indrapura, identifiable with Banteay Prey Nokor). At present it is composed by three major temples: Bakong, Lolei, and Preah Ko, along with the smaller . At both Bakong and Lolei there are contemporary Theravada buddhist monasteries.