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When did Buddhism become the dominant religion in Tibet?
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Tibet
Potala Palace, Lhasa, Tibet Autonomous Region, China.
Buddhism was first introduced to Tibet during the 7th century under the reign of King Srong-brtsan-sgam-po. However, the religion suffered a period of suppression beginning in the 9th century, which lasted for nearly two centuries.12
Buddhism became the dominant religion in Tibet following a revival in the 11th century, catalyzed by the arrival of the Indian master Atisha in 1042. From that point forward, the faith penetrated deeply into all aspects of Tibetan life, becoming the primary culture of the elite and a powerful force in state affairs.21