Protests and uprisings in Tibet since 1950 The minor kingdoms and tribal states of the region were first united under Songtsen Gampo to form the Tibetan Empire in the seventh century CE Under the influence of his Chinese bride and first Nepali wife Bhrikuti, the Emperor converted to Buddhism and established it as the religion of Tibet. An influx of Chinese culture, the Indian alphabet, and Buddhist monks followed, combining with the native customs and animistic religion Bön to give birth to what has become today's ethnic Tibetan people and Tibetan Buddhism, also known as Lamaism, After the break-up of the Tibetan Empire in the mid-9th century,
Buddhism Buddhism was one among several Indian religions that did so. The history of Indian Buddhism may be divided into five periods: Early Buddhism (occasionally called pre-sectarian Buddhism), Nikaya Buddhism or Sectarian Buddhism: The period of the early Buddhist schools, Early Mahayana Buddhism, later Mahayana Buddhism, and Vajrayana Buddhism. According to Lambert Schmithausen Pre-sectarian Buddhism is "the canonical period prior to the development of different schools with their different positions." The early Buddhist Texts include the four principal Nikāyas (and their parallel Agamas) together with the main body of monastic rules, which survive in the various versions of the patimokkha. However,