[1] In the 1780s the cave became the centre of tunnels known as the Lower Galleries of the Northern Defences.

Unlike the Upper Galleries these are not a tourist attraction but can be visited by prior arrangement.

Star Chamber Cave could also be accessed via the King's Lines fortification.

This cave was literally and organisationally at the centre of the tunnelling operations of the 18th century by the Soldier Artificer Company (later the Royal Engineers).

[2] During World War II the tunnels were still being used and brick buildings were constructed within the cave and galleries.