Sang Monastery - Karma Dubgyu Chokhorling Monastery, Sikkim built in 1912 AD. 
Sang Monastery  belongs to  Kagyupa sect of Vajrayana Buddhism
<a href="//commons.wikimedia.org/wiki/User:Prof_Ranga_Sai" title="User:Prof Ranga Sai">Prof Ranga Sai</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>