The Musée départemental Arles antique is an archeological museum housed in a modern building designed and built in 1995 by the architect Henri Ciriani. The museum houses a large collection of antiquities, including monumental Roman sculptures from the local region. Among the exhibits is a model of the multiple overshot water mills which existed at Barbegal, and have been referred to as 'the greatest known concentration of mechanical power in the ancient world'. The Arles Rhône 3, an ancient Roman boat discovered in 2011, is on display since 2013.
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.