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 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.