Brechin has many interesting features, notably its half-finished Cathedral, the famous round tower which was undoubtedly connected with it, or an earlier shrine, and the ruins of the Maison Dieu or hospitium founded by William of Brechin in 1256. The old Cathedral was founded by King David of Scotland in 1150. It is a plain and unpretentious building, now used as a parish church, and it has suffered much from restorers and renovators. Its plan was originally cruciform, but some vandals at the beginning of the eighteenth century entirely destroyed the transepts. The west window and doorway are thirteenth-century work. Most drastic treatment did this church receive in 1806, when besides the destruction of the transepts, the aisles were removed, and new and larger ones erected. The renovators were not satisfied with the old arches of the nave; so they built new and wider ones, and raised the walls, so that one roof could span the whole, and thus eclipsing the clerestory windows. The south side of the nave seems later than the north. Its piers are lighter than those on the opposite side. At the north side of the choir are three lancet windows. The church is disfigured by galleries and pews. The ruins of the chapel of the Maison Dieu are small but interesting. An Early English doorway and a few lancet windows remain. The Round Tower is the principal architectural feature of Brechin. Ireland possesses many of these curious structures, and besides this one Scotland has only one other, the tower at Abernethy. Its date is about 980. The object of such towers is mainly to provide a place of refuge in times of attack, where the monks could store their treasures and protect themselves. They may also have been used as belfries, and their origin is certainly ecclesiastical. There is no staircase, access to the top being gained by ladders resting on wooden floors. The height is 86 feet, the thickness of the wall near the base 4 feet, and the inner diameter 8 feet. An octagonal spire crowns the summit. There is a doorway on the west which is adorned with rude carvings. Over the doorway is a carved representation of the Crucifixion, and on either side of the door are ecclesiastics, and below are strange creatures realistically carved. These figures are interesting memorials of Celtic art.