Ani lhakhang is one of the ancient lhakhang which was designed and consecrated by the great saint Guru Rinpoche in the 8th century. It was initially built by King Trisong Duetsen. According to the oral history, it is said that one of the cows which belonged to a nun from Chhoekhor ran away and headed towards Tang. The nun is said to have followed her cow and in association with this incident, the names of the sacred sites are also named as Bathel, Badorong between Chhoekhor, and Tang.  Finally, when they reached the present location where the lhakhang is built, the cow is said to have rested because the cow could not walk further. So, the nun thought this is all because of fate and then she is said to have tethered her cow to a wooden post. Later the cow was said to have died in that very spot where it was tied down.. The wooden post is believed to have been put inside the chorten as the main relics and the name of the lhakhang came to be known as Ani Lhakhang which is directly associated with the nun.