Khmer Empire
The Khmer Empire was an empire in mainland Southeast Asia, centred on hydraulic cities in what is now northern Cambodia. Known as Kambuja (Old Khmer: កម្វុជ; Khmer: កម្ពុជ) by its inhabitants, it grew out of the former civilisation of Chenla and lasted from 802 to 1431 AD. Historians call this period of Cambodian history the Angkor period, after the empire's most well-known capital, Angkor.