Jayavarman Vll ruled from 1181-1215. He was regarded the greatest of all khmer rulers. He waged war agaisnt Champa for twenty-two years and conquered much of its land. Varieties of buddism had long been practiced alongside Hinduism, however Jayavarman Vll was a follower of the mahayana buddism faith and he made this the new state religion. Under his ruling. the khmers built Angkor Thom, meaning great city, which included Bayon temple, along with many other temples.