Marseille Cathedral has been a basilica minor since 1896. It is the seat of the Archdiocese of Marseille.
Part of the earlier, much smaller cathedral still remains, alongside the new cathedral. It was built in the 12th century in a simple Romanesque style. The eclectic style is characteristic of the 19th century. Two bays of the nave were demolished in the 1850s, when the new cathedral was built. What remains is the choir and one bay of the nave. It is commonly referred to as the Vieille Major. The composer Charles Desmazures was organist at the old cathedral.
The present cathedral, the Nouvelle Major, was built on an enormous scale in the Byzantine and Roman Revival styles. The foundation stone was laid by Emperor Napoleon III in 1852 and the first service was held in 1893. It was completed in 1896, given the title of minor basilica, and consecrated in 1897. It was built on the site used for the cathedrals of Marseille since the fifth century, principally by the architects Léon Vaudoyer and Henri-Jacques Espérandieu. It is 142 meters long, and the main cupola is 70 meters high. With a capacity of 3,000 seats, it is one of the largest cathedrals in France. It is a listed monument since 1906.
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.