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 Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.