Trisong Detsen

Tri Songdetsen ཁྲི་སྲོང་ལྡེ་བཙན
Tsenpo
Tri Songdetsen statue at Samye.
Emperor of Tibet
Reign	755–794
Predecessor	Me Agtsom
Successor	Muné Tsenpo
Regent	Mashang Drompakye
Born	742
Died	797 (age 55)
Burial	Trülri Tsuknang Mausoleum, Valley of the Kings
Spouse	Tsépongza Métokdrön Chimza Lhamotsen Kharchenza Chogyel Droza Trigyel Motsen (aka Jangchup Jertsen) Poyöza Gyel Motsün Yéshé Tsogyel
Issue	Mutri Songpo Muné Tsenpo Mutik Tsenpo Sadnalegs
Names Tri Songdetsen
Lönchen	list We Nangshar Sutsen Gos Trisang Yalag Chimshang Gyalsig Shuteng Nganlam Takdra Lukhong Nanam Shang Gyaltsen Lhanang
Father	Me Agtsom
Mother	Nanamza Mangpodé Zhiteng
Religion	Tibetan Buddhism

Tri Songdetsen (Tibetan: ཁྲོ་སྲོང་ལྡེ་བརྩན། ཁྲི་སྲོང་ལྡེ་བཙན, Wylie: khri srong lde brtsan/btsan, ZYPY: Chisong Dêzän, Lhasa dialect: [ʈʂʰisoŋ tetsɛ̃]) was the son of Me Agtsom, the 38th emperor of Tibet. He ruled from AD 755 until 797 or 804. Tri Songdetsen 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.

The empire Tri Songdetsen inherited had declined somewhat from its greatest extent under the first Dharma King, Songtsen Gampo. Disintegration continued when, in 694, Tibet lost control of several cities in Turkestan and, in 703, Nepal broke into rebellion. Meanwhile, Arab forces vied for influence along the western borderlands of the Tibetan empire. Nevertheless, Tri Songdetsen became imperial Tibet's greatest ruler and an unparalleled Buddhist benefactor.^[1]