St Cybi's Church is a medieval church near the Roman Caer Gybi in Holyhead. The original church was constructed at Holyhead around 540 AD by St Cybi, a cousin of St David. The church was sacked by Viking invaders in the 10th century and damaged again in 1405 by Henry IV's invading force. The present church was built in the 13th century and stands near the Roman fort in Holyhead.
The present church of St Cybi's was built in between the 13th to 16th centuries. The chancel is one of the oldest parts of the church, dating to the 13th century. In 1897 a chapel designed by British architect Hamo Thornycroft was added to the south. Further renovations were undertaken in the 20th century. A sun dial is located on the south transept. Ornamental figures are located throughout the church, both inside and out.
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.