Isca Dumnoniorum

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. The city walls of Exeter (some 70% of which survive) mark the former perimeter of Isca.