Norbu, with the later title of Depa and also known as Nangso Norbu, was a Tibetan government official born in the central Tibetan province of U around the end of the 16th century. In 1644 he was appointed Governor of Shigatse, a post he held until 1659 when he succeeded his elder brother, Desi Sonam Chopel as de facto ruler of Tibet on behalf of the Fifth Dalai Lama. After a brief reign as Regent he rebelled unsuccessfully against the Ganden Podrang government and was banished. His last recorded activity was in 1660. The best source we have for his life is the autobiography of the Fifth Dalai Lama.