Or Bon po; The pre-Buddhist faith of many of the Tibetan peoples. Probably originally shamanistic in origin, it underwent a transformation in reaction to the arrival of Buddhism in Tibet in the 8th and 9th centuries. Bon pos are followers of this reformed Bon religion, which claims to have been founded in the distant past by Shenrab Mibo. Most of present-day Bon religious practice and sacred texts are clearly copied from Buddhism. Before the Chinese invasion of 1959 there were 350 Bon monasteries in Tibet.