Thangtong Gyalpo or Lama Chag Zhampa (Tibetan Yogi) visited in 13th century.
12th and 13th Thegtse Rinpoche Namgye Tsering and Yeshe Zangpo also visited annually in 18th and 19th centuries as a pilgrimage.
Gopteswar temple of Singari Hill is held in high veneration by the Tibetan Buddhist and Bhutanese since very early times.
The Ahom chronicles informs us that, during the Ahom-Mughal war (1615-- 1638 C. E.) the silver cap of the idol of Gopeswar temple earlier endowed by the Bhutanese was damaged and looted by the Mughals.
According to the chronicles seizing of the Mughal boats and killing of a Mughal merchant who traded aloe wood at Singari trade mart was the immediate cause for the Ahom-Mughal war in 1615 C. E. During the reign of Supatphaa Swargadeo Gadadhar Singha at Singari Chawki (Check post) was established to protect traders and travellers.