St. Rule's Tower, sometimes referred to as the Square Tower (108 feet high), affords a wonderful panoramic view over the town and harbour and to the surrounding countryside. Access to the tower requires an entrance token which can be obtained at the cathedral visitor centre. The climb to the top of the tower is via a rather narrow and steep spiral staircase (151 steps) on which it is difficult to pass those headed in the opposite direction.

The PiP shows an old pen and ink drawing - date unknown.

When I was a child climbing the the square tower was free for everyone. The buildings haven't changed though.