What it is: A defensive wall built by the Romans that once guarded the empire's northernmost frontier in England. Construction started around A.D. 122, after a visit to Britain by Emperor Hadrian ...
In 122 AD, Roman emperor Hadrian ordered the building of a wall to mark his empire’s British frontier. How long did it take ...
Hadrian's Wall served as the most northerly frontier of the Roman Empire for 300 years. The wall is located in northern England, runs for about 74 miles (118 kilometers) between Bowness-on-Solway in ...