Bakong is the first Khmer temple mountain of sandstone constructed by rulers of the Khmer Empire at Angkor near modern Siem Reap in Cambodia. In the final decades of the 9th century AD, it served as the official state temple of King Indravarman I in the ancient city of Hariharalaya, located in an area that today is called Roluos.

Khmer architecture, also known as Angkorian architecture, is the architecture produced by the Khmers during the Angkor period of the Khmer Empire from approximately the later half of the 8th century CE to the first half of the 15th century CE.