reaction to the wars with the Tamil that nearly destroyed Buddhism in Sri Lanka in the 9th and 10th centuries. As Theravada Buddhism struggled for survival in Sri Lanka, it developed a resiliency that generated a renaissance throughout the Buddhist world, and would eventually spread across Burma, Chang Mai, the Mon kingdoms, Lana, Sukothai, Laos, and Cambodia. In the 13th century, wandering missionaries from the Mon-Khmer-speaking parts of Siam, Burma, Cambodia, and Sri Lanka played an important part in this process. When Prince Tamalinda returned after ten years of ordination, he was a Thera, a senior monk, capable of administering ordination into this vigorous Theravada lineage, which insisted on orthodoxy and rejected Mahayana "innovations" such as tantric practices. The mass conversion of Khmer society to Theravada Buddhism amounted to a nonviolent revolution every all level of society. Scholars struggle to account for this sudden and inexplicable transformation of Khmer civilization. Theravada Buddhism succeeded because it was inclusive and universal in its outreach, recruiting the disciples and monks from not only the elites and court, but also in the villages and among the peasants, enhancing its popularity among the Khmer folk. With the rise of Siam in the west and Vietnam in the east, the classical Angkor empire disappeared and the beginning of present-day Cambodia began. Cambodia became from this time forward a Theravada Buddhist nation. Buddhist Middle Ages The Jinakalamali gives an account of the cultural connections between Cambodia and Sri Lanka in the fifteenth century. It states that 1967 years after the Mahaparinibbana of the Buddha, eight monks headed by Mahananasiddhi from Cambodia with 25 monks from Nabbispura in Thailand came to Sri Lanka to receive the umpasampada ordination at the hands of the Sinhalese Mahatheras. As Angkor collapsed under the advancing jungles, the center of power of the Theravada Cambodia moved south toward present day Phnom Penh. Phnom Penh was originally a small riverside market center where the Mekong River and the Tonle Sap River converge. Phnom Penh was founded when Lady Penh found a "four-faced Buddha" floating down the river on a Koki tree during the flooding season. She retrieved the Buddha image and had the Wat Phnom constructed to house the image. The four-faced Buddha [Buddha facing the four directions] is important in Khmer Buddhist iconography, signifying the establishment of the kingdom of the Buddha of the Future, Maitreya, who is often identified with the Buddha-king