Shashur or Sashur Monastery is a Buddhist monastery of the Drugpa sect in Lahaul and Spiti, Himachal Pradesh, northern India. It is located 137 kilometres from Manali. Sha-shur means “blue pines” in the local dialect, as patches of blue pine can be seen around the monastery. . The monastery was built in the 17th century by Lama Deva Gyatsho of Zanskar who was a missionary of Nawang Namgyal, the king of Bhutan.
The lamas of the gompa are of the Drukpa sect (red hat sect). Namgyal founded this sect and the name originated from Dug, which in the Bhoti language, translates to Bhutan. Before Deva Gyatsho renovated the present monastery, there existed a small gompa. Deva Gyatsho stayed at the monastery till his death. When he was being cremated, it is said, that his heart did not burn and was enclosed in a black image of Gyatsho. This monastery has large Thangka paintings, some of them over fifteen feet, and wall paintings depicting all the 84 siddhas of Buddhism.