Buddhism Comes To Tibet, by Dzogchen Ponlop Rinpoche Originally published in Bodhi Magazine, Vol. 8-4.
KING SONGTSEN GAMPO INTRODUCES BUDDHISM INTO TIBET. In the history of the kingdom of Tibet, the fifth king was known by the name of Songtsen Gampo, who was regarded as a very spiritual and positive leader. During his reign, King Songtsen Gampo introduced the basic spiritual practices of Buddhism.