Cambrai Cathedral was built between 1696 and 1703 on the site of a former 11th century building, as the church of the Abbey of St-Sulpice. During the French Revolution the old cathedral of Cambrai was destroyed, but the abbey church survived because it was used as a Temple of Reason. When the ecclesiastical status of Cambrai was restored in 1802, albeit as a diocese rather than as an archdiocese, which it had previously been, the bishop"s seat was established in the surviving abbey church, which became the cathedral of Cambrai. Cambrai was again constituted an archbishopric in 1841.
The cathedral was severely damaged by fire in 1859, but at length restored, with advice from Viollet-le-Duc, and consecrated on 12 May 1894. The cathedral was also badly damaged in World War I and, not so seriously, in World War II.
It contains the tomb, by David d"Anger, of François Fénelon, who was archbishop from 1696 to 1715. The Cathedral is a minor pilgrimage site because of the noted Italo-Byzantine painting called 'Our Lady of Cambrai' or the Cambrai Madonna (c. 1340) in a side chapel.
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.