St Cadwaladr's Church is a Grade I listed church in Llangadwaladr, Anglesey. The church is built in the perpendicular style. The nave is dated to the 12th to early 13th century and the chancel to the 14th. Considerable additions were later made in the mid 17th century, with the north chapel in 1640 and the south chapel in 1661. In 1856 the church underwent restoration, at which time to south porch was added.
In the newer part of the churchyard, south of the church, are war graves of four British airmen and a Polish airman of World War II.
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.