Pfünz Roman Fort, Castra Vetoniana, was a Roman cohort camp near Pfünz, a village in the municipality of Walting. It was built in about 90 AD on a 42-metre-high Jurassic hillspur between the valley of the Altmühl and that of the Pfünzer Bach stream. it is a component of the Rhaetian Limes which was elevated in 2005 to the status of a UNESCO World Heritage Site.
Of historical importance are the remains of the double V-shaped ditches hewn out of the rock in front of the position, the one on the western rampart being the best preserved. In 1998, as part of the construction of a high pressure water system, the Bavarian State Office for Monument Protection carried out further test excavations. The archaeological record and rich finds from Pfünz, some of which are very rare, are seen as reasons for further studies in the future.
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.