The small town of Langres was once the capital of the Romanized Gallic tribe known as the Lingones. At a later date the Romans fortified the town, which they called Andemantunum, located at a strategic crossroads of twelve Roman roads. The first-century Triumphal Gate and the many artefacts exhibited in the museums are remnants of the town's Gallo-Roman history. After the period of invasions, the town prospered in the Middle Ages, due in part to the growing political influence of its bishops.
The troubled 14th and 15th centuries caused the town to strengthen its defenses, which still give the old city its fortified character, and Langres entered a period of royal tutelage. The Renaissance, which returned prosperity to the town, saw the construction of numerous fine civil, religious and military buildings that still stand today. In the 19th century, a 'Vauban' citadel was added.
Today Langres has a historic town center surrounded by 13km long defensive walls, with a dozen towers and seven gates.
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.