In 1879 the steamship ‘Havilah’ landed three 4.6 tonne, 68-pounder cannon as part of Wollongong Harbour defences against the threat of possible Russian attack.
However, by the mid-1880s it became obvious that enemy cruisers could bombard the port out of range of these obsolete guns.
In 1890 a larger and more modern 6-inch gun was positioned in a concrete pit near the summit of Flagstaff Hill.
The fort was dug-out of the hill using face brick walls and then earth was placed over the tunnels.
Media related to Flagstaff Hill Fort, Wollongong at Wikimedia Commons