Trashiyangtse Dzong is built on a ridge along Dongdi chu. Terton Pema Lingpa built the Dzong in the 15^th century when he came across the ruins of the old Dongdi Dzong. It was renovated first in 1975, and then again renovated and sanctified by His Holiness the Je Khenpo Trulku Jigme Choeda in 2005.