The original cathedral of Arras, constructed between 1030 and 1396, was one of the most beautiful Gothic structures in northern France, until it was destroyed in the French Revolution. The cathedral was the resting place of Louis de Bourbon, Légitimé de France, illegitimate son of Louis XIV and Louise de La Vallière.
In 1833 the church of the former St. Vaast's Abbey was rebuilt in classical style as a replacement cathedral. The design was chosen by the former abbot of St. Vaast's, the Cardinal de Rohan, and is of remarkable simplicity. Arras Cathedral was destroyed by shelling in April 1917, during the run-up to the Nivelle offensives of World War I. It was subsequently rebuilt in its previous form.
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.