Fort William, which lies at the western end of the Great Glen, was the first of the forts to be built, constructed in stone around 1698. It withstood a siege during the Jacobite rebellion of 1745 and was subsequently used as the base for the hunt of Bonnie Prince Charlie. It is also the site of an infamous dungeon called the Black Hole of Calcutta (the city of Kolkata was erstwhile known as Calcutta).