The Arch of Germanicus is an ancient Roman arch in Saintes in France. It was built in 18 or 19 AD by a rich citizen of the town (then known as Mediolanum Santonum), C. Julius Rufus, and dedicated to the emperor Tiberius, his son Drusus Julius Caesar, and his adoptive son Germanicus. It has two bays and was originally sited over the terminus of the Roman road from Lyon to Saintes. On the proposal of Prosper Mérimée in 1843 it was moved fifteen metres during works on quays along the river, and it was restored in 1851.
15.9 metres long and 15 metres high, it is the best preserved Roman remains in the city of Saintes.
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.