St Macartan's Cathedral, Clogher is one of two cathedral churches in the Diocese of Clogher in the Church of Ireland.
According to tradition a monastery and bishopric were founded in Clogher circa 490 by St. Macartan on the orders of St. Patrick.
In 1041, the church of Clogher was rebuilt, and dedicated to the memory of St. Macartin. It was again rebuilt in 1295 by Matthew M'Catasaid, Bishop of Clogher, but burnt to the ground on 20 April 1396 along with two chapels, the abbey, the court of the bishops, and thirty-two other buildings with all their contents. In 1610 the abbey and its revenues were confiscated by King James I and given to the Diocese of Clogher. The present building was erected on the site in 1744 by architect James Martin in a neo-classical style.
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.