St Muredach's Cathedral is located on the east bank of the River Moy in Ballina, County Mayo. It is a detached six-bay double-height building on a cruciform plan comprising a four-bay double-height nave which opens into single-bay double-height transepts all centred on a single-bay double-height chancel.
The cathedral's construction was initiated by Bishop John MacHale (1791–1881) who served as the Bishop of Killala from 1825 to 1834 and the completion of the cathedral in 1834 coincided with his translation to the Archdiocese of Tuam.
The spire was completed in 1855 to the designs of the celebrated architect James Joseph McCarthy and further embellishment continued throughout the nineteenth century.
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.