After the end of Roman rule in Britain in about 410, the kingdom of Dumnonia emerged covering Devon and Cornwall, based on the former Roman civitas and named after the pre-Roman Dumnonii.
Exeter, known as "Caer Uisc", may have been central to the kingdom but some historians and antiquaries have speculated that the Kings of Dumnonia may have been itinerant with no fixed capital and moved their court from place to place.