Tango is believed to be the sacred place where the compassionate Avaloketesvara emanated himself as Wrathful God Hayagriva. The place is blessed by Guru Rinpoche in the 8th century.
Tsangpa Gyarey Yeshey Dorji prophesied Phajo Drugom Zhigpo to spread Drukpa Kagyud in the southern valley of Sandalwood. When Phajo reached this place, he heard a neighing of the horse. He also saw vision of Bhagavat Hayagriva-the Horse Head King speaking to him.
Since then the successive decedents of Phajo had been taking care of the place. In the 15tt century came the divine Madman Choeje Drukpa Kilney who blessed the place saying that his successive decedents would take care of the place. Thus the Divine Son Ngawang Tenzin opened the door of this sacred place.
Later Ngawang Tenzin’s son Tshewang Tenzin offered the place to Zhabdrung Ngawang Namgyel. While meditating in this place, Zhabdrung killed Tsang Desi and His wife through his tutelary power. Thus this cavern is also known as Dueduelphug(a place where demons are subjugated). It is also here the Zhabdrung composed 16 I’s famously Ngachu Drugma.
In 1689, son of Tshewang Tenzin and Damchoe Tenzima, 4th Druk Desi Tenzin Rabgay built the Monastery as per prophecy of Guru Rinpoche.
In 1966, the 64th Je Khenpo Jamyang Yeshey Singye along with Queen Mother Ashi Phuntsho Chodden revived the Shedra. In 1977, the Queen Mother Ashi Kesang Choden renovated the monastery.
Today, the site houses the many temples dedicating to many Deities and Buddhas. More importantly, it is the present abode of Tenzin Rabgay’s Yangsi and the seat for the Drubdey.