While the Tibetan plateau has been inhabited since pre-historic times, most of Tibet's history went unrecorded until the introduction of Tibetan Buddhism around the 6th century. Tibetan texts refer to the kingdom of Zhangzhung as the precursor of later Tibetan kingdoms and the originators of the Bon religion. While mythical accounts of early rulers of the Yarlung Dynasty exist, historical accounts begin with the introduction of Buddhism from Nepal in the 6th century and the appearance of envoys from the unified Tibetan Empire in the 7th century. Following the dissolution of the empire and a period of fragmentation in the 9th-10th centuries, a Buddhist revival in the 10th–12th centuries saw the development of three of the four major schools of Tibetan Buddhism.

Bon or Bön, also known as Yungdrung Bon, is the indigenous Tibetan religion which shares many similarities and influences with Tibetan Buddhism. It initially developed in the tenth and eleventh centuries but retains elements from earlier Tibetan religious traditions. Bon is a significant minority religion in Tibet, especially in the east, as well as in the surrounding Himalayan regions.