Bayeux Cathedral is a Norman-Romanesque style cathedral built originally in the 11th century. It was the original home of the Bayeux Tapestry and is a national monument of France. The site is an ancient one and was once occupied by Roman sanctuaries. The present cathedral was consecrated on 14 July 1077 in the presence of William, Duke of Normandy and King of England. It was here that William forced Harold Godwinson to take the oath, the breaking of which led to the Norman conquest of England.
Following serious damage to the Cathedral in the 12th century, the Cathedral was rebuilt in the Gothic style which is most notable in the crossing tower, transepts and east end. However, despite the crossing tower being started in the 15th century, it was not completed until the 19th century. The interior was destroyed during the Wars of Religion in 1562 and restored in 1589.
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.