The Abbey Church of Saint-Pierre-sur-Diveswas was rebuilt in the 12th century and 13th centuries and restored and modified in the 16th and 17th centuries, replacing the former abbey church built in 1011 by William the Conqueror's aunt, Countess Lesceline. The church was entirely restored in the 16th century. By that time it got its general current appearance: a long main nave with two aisles and five radiating chapels, in the gothic 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.