Brechin Cathedral dates from the 13th century. Immediately adjoining the cathedral to the southwest stands the Round Tower, built about 1000 A.D.
The western gable with its flamboyant window, Gothicdoor and massive square tower, parts of the (much truncated) choir, and the nave pillars and clerestory are all that is left of the original edifice. The modern stained glass in the chancel is reckoned amongst the finest in Scotland.
The quality of the masonry is superior to all but a very few of the Irish examples. The narrow single doorway, raised some feet above ground level in a manner common in these buildings, is also exceptionally fine. The door-surround is enriched with two bands of pellets, and the monolithic arch has a well-preserved representation of the Crucifixion. The slightly splayed sides of the doorway (also monolithic) have relief sculptures of ecclesiastics, one of them holding a crosier, the other a Tau-shaped staff.
Two monuments preserved within the cathedral, the so-called 'Brechin hogback', and a cross-slab, 'St. Mary's Stone' are further rare and important examples of Scottish 11th century stone sculpture. The hogback combines Celtic and Scandinavian motifs, and is the most complex known stone sculpture in the Ringerike style in Scotland. The inscribed St Mary's Stone has a circular border round the central motif of the Virgin and Child which echoes that on the Round Tower.
As a congregation of the Church of Scotland, which is Presbyterian, the church is not technically a cathedral, in spite of its name.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.