50°43′19″N 3°32′02″W / 50.722°N 3.534°W
Isca Dumnoniorum, also known simply as Isca, was originally a Roman legionary fortress for the Second Augustan Legion (established c. AD 55) in the Roman province of Britannia at the site of present-day Exeter in Devon.
The town grew up around this fortress and served as the tribal capital of the Dumnonians under and after the Romans.[1] The city walls of Exeter (some 70% of which survive) mark the former perimeter of Isca.