Known as ‘The Fortress of the auspicious hill’, Trashigang Dzong was built in 1659 to defend against Tibetan invasions. The historic significance of this dzong is its strategic position on the spur overlooking Drangmachhu River that has visually suppressed invading Tibetan armies. It is believed that the view of the dzong forced them to retreat, as the soldiers said, “the fortress is not on the ground, but looks like it is a sky fortress”. As highlighted in this oral history, the dzong does look high above in the sky when viewed from the chazam (the iron bridge) below.