This very beautiful tower is built entirely of limestone undressed, except around the doorway and other apertures, and is of admirable masonry. It has two projecting ledges or steps at its base, and six rests for stories, with intermediate projecting stones or brackets in its interior. These stories are each, as usual, lighted by a single aperture, with the exception of the upper one, which has two openings, one facing the east, and the other the west; and the apertures present all the architectural varieties of form observable in our most ancient churches. The circumference of this tower, near its base, is 66 feet 6 inches, and its height, to the slant of the roof, which is wanting, is about 100 feet. The wall is 3 feet 9 inches in thickness, and the doorway is 12 feet from the ground. This doorway--which is of very beautiful execution, and, as usual, faces the west end of the church--is 5 feet 2 inches in height, and has inclined sides, and a semicircularly arched top. It is 2 feet 3 inches wide at bottom, and 2 feet beneath the spring of the arch at top. Over the door there is a figure of the Saviour sculptured in relief, partly on the keystone and partly on the stone over it; and on each side of the architrave there is a human head also in relief, as on the doorway of the church of Kells.
Some antiquaries, in their zeal to support the theory of the Pagan origin and the antiquity of the Round Towers, have asserted that this doorway is not the original one, but an “after work.” But there is not the slightest ground for such a supposition, and this sculpture, as a profoundly skilled architectural antiquary, the late Sir Richard Colt Hoare, well observed, furnishes “a decided proof that these buildings were not (as some writers have conjectured) built by the Pagans.”
A similar argument against the application of the Round Towers to the purposes of a belfry, has been grounded on the circumstance of the western front of the church having three apertures for bells above its gable. But it should not be forgotten that this structure has no claim to an earlier date than the thirteenth century, when a variety of bells, and a different mode of hanging them, were brought into use by the Anglo-Norman settlers.