The document summarizes pre-colonial architecture in Cambodia. It describes three early architectural styles from 610-800 AD before the Angkor period began in 802 AD. It then discusses major temples built during the Angkor period including Angkor Wat and Bayon temple. Angkor Wat, built in the 12th century, combines the temple-mountain and galleried styles and was dedicated to the Hindu god Vishnu. Bayon temple was built in the late 12th/early 13th century as the state temple of King Jayavarman VII, originally dedicated to Mahayana Buddhism.