Angkor was the capital city of the Khmer Empire, which also recognized as Yasodharapura and flourished from approximately the 9th to 15th centuries. Angkor was a megacity supporting at least 0.1% of the global population during 1010–1220. The city houses the magnificent Angkor Wat, one of Cambodia's popular tourist attractions.
The word Angkor is derived from the Sanskrit nagara, meaning "city". The Angkorian period began in AD 802, when the Khmer Hindu monarch Jayavarman II declared himself a "universal monarch" and "god-king", and lasted until the late 14th century, first falling under Ayutthayan suzerainty in 1351. A Khmer rebellion against Siamese authority resulted in the 1431 sacking of Angkor by Ayutthaya, causing its population to migrate south to Longvek.
The ruins of Angkor are located amid forests and farmland north of the Great Lake and south of the Kulen Hills, near modern-day Siem Reap city, in Siem Reap Province. The temples of the Angkor area number over one thousand, ranging in scale from nondescript piles of brick rubble scattered through rice fields to the Angkor Wat, said to be the world's largest single religious monument.