The spire at the top of the utse (the dzong's central tower or the main tower[REF]) was added in 1676 by Gyaltsen Tenzin Rabgye-the abbot of the dzong.
From 1744 to 1763, the dzong was enlarged substantially during the rule of the 13th desi, when Sherab Wangchuk was the chief abbot of Bhutan [REF].