The plan consists of a nave and chancel, with a square tower on either side, at their junction. The south tower, about 55 feet high, is ornamented externally with six projecting bands, three of which are continued along the side-walls of the structure, and it is finished at the top by a plain parapet, the masonry of which is different from that of the other portions, and evidently of a later period. The north tower, 50 feet high, remains in its original state, and is covered with a pyramidal cap of stone. An almost endless variety of Irish-Romanesque decorations appear upon the arches, and other features of the building, both within and without. Both nave and chancel are roofed with a semicircular arch, resting upon square ribs, which spring from a series of massive semi-columns, set at equal distances against the walls. The bases of these semi-columns are on a level with the capitals of the chancel-arch, the abacus of which is continued as a string course round the interior of the building. The chancel-arch causes a singular effect from its not being quite in the centre between the main walls. There is no east window; but an altar recess, arcaded, projects externally, thus forming a third division to the building. The walls of both nave and chancel beneath the string course are ornamented with a row of semicircular arches, slightly recessed, and enriched with chevron, billet, and other ornaments and mouldings. Those of the nave spring from square imposts resting upon piers; while those in the chancel have pillars and well-formed capitals. Other churches of about the same period are found with similar arcades, such as Kilmalkedar and Ardmore. There are small crofts to which access is gained by a spiral stair in the south tower, between the vaulting over both nave and chancel and the external roof. The chamber over the chancel is 6½ feet lower than that over the nave; these are connected by a doorway and flight of steps, and are lighted by windows; at the west end is a fireplace. These little apartments were, no doubt, used as dormitories by the ecclesiastics. A somewhat similar croft in the church of St. Doulough’s, near Dublin, is furnished with a fireplace--a fact which clearly demonstrates that they were applied to the purpose of habitation.