Mangsong Mangtsen
2nd Tibetan Emperor and 35th King of Tibet (636–676)
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Mangsong Mangtsen (Tibetan: མང་སྲོང་མང་བཙན, Wylie: mang srong mang btsan) (636 – 676), also known as Trimang Löntsen or Khri-mang-slon-rtsan, was the 35th King (Tsenpo) of Tibet from 650 to 676. He succeeded to the throne after the death of his grandfather Songtsen Gampo. As Songtsen Gampo's only son Gungsong Gungtsen had died early, he was succeeded by his infant grandson Mangsong Mangtsen.