Trisong Detsen
Trisong Detsen () was the son of Me Agtsom, the 38th emperor of Tibet. He ruled from AD 755 until 797 or 804. Trisong Detsen was the second of the Three Dharma Kings of Tibet, playing a pivotal role in the introduction of Buddhism to Tibet and the establishment of the Nyingma or "Ancient" school of Tibetan Buddhism.