where did hadrian's wall start and end
Hadrian's Wall Path The Hadrian’s Wall Path is a long distance footpath in the north of England, which became the 15th National Trail in 2003. It runs for 84 mi (135 km), from Wallsend on the east coast of England to Bowness-on-Solway on the west coast.[1] For most of its length it is close to the remains of Hadrian's Wall, the defensive wall built by the Romans on the northern border of their empire. This is now recognised as part of the "Frontiers of the Roman Empire" World Heritage Site.
Walls of Constantinople 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, when well-manned, they were almost impregnable for any medieval besieger, saving the city, and the Byzantine Empire with it, during sieges from the Avar-Sasanian coalition, Arabs, Rus', and Bulgars, among others. The advent of gunpowder siege cannons rendered the fortifications vulnerable, but cannon technology was not sufficiently advanced to capture the city on its own, and the walls could be repaired between reloading. Ultimately the city fell from sheer weight of numbers of the Ottoman forces on 29 May 1453 after a six-week siege.