The Pont du Diable on the Hérault River is one of many bridges in France with this name (it means Devil's bridge). Constructed by Benedictine monks in the first half of the 11th century, it provided a link between the abbey at Aniane and the Gellone Abbey at Saint-Guilhem-le-Désert. Though subsequently widened and raised several metres around 1770, it has retained its original shape. Vehicular traffic is now catered for by a newer bridge, from which splendid views may be had of the original bridge and an aqueduct that takes water to the vineyards of Saint-Jean-de-Fos.
The bridge has been listed by the French Ministry of Culture as a monument historique since 1935 and is listed as a UNESCO World Heritage Site as part of the World Heritage Sites of the Routes of Santiago de Compostela in France.
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.