Dumnonia until they submitted to the See of Canterbury in the mid-9th century. Parish organisation was a later development of fully Normanised times. Around AD 55, the Romans established a legionary fortress at "Isca Dumnoniorum", modern Exeter, but west of Exeter the area remained largely un-Romanized. Most of Dumnonia is notable for its lack of a villa system, though there were substantial numbers south of Bath and around Ilchester, and for its many settlements that have survived from the Romano-British period. As in other Brythonic areas, Iron Age hillforts, such as Hembury and Cadbury Castle, were refortified in post-Roman times for
Caerleon Roman Fortress and Baths late 1970s, and a curator was appointed in 1980 when the site was opened to the public. The Roman Baths Museum lies inside what remains of the fortress of Isca Augusta close to the National Roman Legion Museum. The baths museum has a covered walkway over part of the remains of the military bath house. There was a frigidarium, tepidarium and caldarium, as well as an open-air swimming pool. The baths museum is administered by Cadw, as are the remains of Isca Augusta within a short walk of the baths museum: There were over 40,000 visitors to the Baths in