Agde Cathedral is dedicated to Saint Stephen and stands on the bank of the Hérault River. The present building was constructed in the 12th century, beginning in 1173 under the direction of bishop William II of Agde, and replaced a Carolingian church of the 9th century that stood on the foundations of a 5th-century Roman church, formerly a temple of Diana.
The cathedral is remarkable for being built of black basalt from the nearby volcanic Mont St. Loup quarries. The building is extremely strong and was designed to serve as a fortress as much as a church: the walls are between 2 and 3 metres thick, and the square tower, 35 metres high, could also function as a keep, or donjon. The crenellations and machicolations are very prominent, and again, more characteristic of a fortress than of a church.
The Romanesque cloister which once adjoined the cathedral was demolished in 1857. Many of the materials, such as the capitals and the columns, were shortly afterwards reused for the construction of the lady chapel, which is now used as the entrance.
In the severe interior the 17th century high altar of polychromatic marble stands out all the more, as do the organs in Baroque style.
Of the cathedral's five bells, four are hung in the belltower, and were cast by Burdin-Aîné of Lyon in 1894 and 1895. The fifth is on top of the bellower and is used only for the chiming of the clock, cast in 1665 by Daniac Fulcrand at Béziers, and declared a monument historique in 1959.
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.