Padmasambhava, also known as Guru Rinpoche , incarnated as a fully enlightened being, as foretold by Buddha Shakyamuni. Padmasambhava is considered the Second Buddha by the Nyingma school, the oldest Buddhist school in Tibet known as "the ancient ones". Around 767 he came to Tibet and helped construct Samye Monastery, the first Buddhist and Nyingma monastery in Tibet. Padmasambhava then revealed the Vajrayana of Tibetan Buddhism, with scholars, translators, and masters. His students in Tibet include the great master Yeshe Tsogyal and the "Twenty-Five King and Subjects".