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
Southern England as with most geographical regions, people sometimes debate the boundaries. In the west, Southern England is generally taken to include Gloucestershire and Oxfordshire; in central Southern England, the counties of Bedfordshire, Buckinghamshire and Hertfordshire; to the east, Essex and the counties of East Anglia (Cambridgeshire, Norfolk and Suffolk). Despite these definitions, the northern boundary is generally taken to correspond to an imaginary line from the Severn Estuary to the Wash (or expressed in terms of towns, from Gloucester to King's Lynn). Southern England Southern England, or the South of England, also known as the South, refers roughly to the southern