The dzong is on a thin promontory that overlooks the confluence of the Drangme Chhu and the Gamri Chhu. It was built in 1667 by Mingyur Tenpa, Bhutan's third desi . The entire eastern region was governed from this dzong from the late 17th century until the beginning of the 20th century. Several tame jaru (ghoral ; mountain goat) roam the exterior courtyards.
This dzong is unusual in that both the administrative and monastic bodies face onto a single dochey (courtyard). By the entry gate look left for the fine mani lhakhang and its slate carving of Seng Doma, a local protector that is half-male, half-female.
Inside are a half-dozen lhakhangs, though what you get to see will depend on which monks are around. The 1st-floor goenkhang features paintings of a yeti, while another chapel is dedicated to the deity Choegi (Yama) Gyelpo, the wrathful aspect of Chenresig. He is a protector of the faith, the god of death and the king of law, and the one that weighs up the good and evil at the end of a person's life.
Many lama dances are performed in Trashigang to appease Yama, especially during the three-day tsechu in November/December, which also includes the unveiling of a large thangka and the displaying of a statue of Guru Rinpoche on the last day.
