In the Angkorean era, the ancient Khmer Kingdom dominated most of present Southeast Asia from 800 to 1430 AD. The Angkor Complex is the soul of Khmer people (approximately 90% of Cambodia Population). Inside the Angkor-complex area consist of 200 monuments, which spread over an area of 400 square kilometers. There are various Khmer temples were built between the 7th and 13th centuries by Khmer kings when the Khmer civilization was at its height of the extraordinary creativity. The Angkor architecture serves as the evidence of the strong Khmer religious beliefs - Hinduism and Buddhism. And, the most popular temples in the Angkor area are Angkor Wat, Angkor Thom, Bayon, Baphuon, Phimeanakas, Ta Keo, Ta Prohm, Banteay Kdei, Pré Roup, East Mebon, Kravan, Preah Khan, Neak Poan, Banteay Srey, Rolous Group, etc.