Place name origins only have little relation to the Roman names (e.g. Chester - 'Deva', Winchester - 'Venta Belgarum' etc.). Many English places derive part of their name from the river upon which they were built, but in the 16th century many English rivers were renamed with back-formations from towns on their banks. Cambridge, perhaps uniquely, illustrates both effects: originally "Grontabricc", a bridge on the Granta, the name became "Cantebruge" and then "Cambrugge", from which the river was renamed Cam. The vast majority of place names in Wales are Welsh by origin, containing elements such as Llan-, Aber-, Pen- etc. Along the south
Venta Silurum which was located on the Roman road between "Isca Augusta" (Caerleon) and "Glevum" (Gloucester) and close to the Severn estuary, was - in contrast with nearby "Isca" - essentially established for civilian administration rather than for military purposes. Initially Venta had a forum and basilica. By the early part of the 2nd century, during the reign of Hadrian, the "civitas" had begun construction work on a market place and developing centre of local government. Public baths and shops, including a blacksmiths, were built about the same time. Remains of farms and dwellings, some with courtyards, have also been excavated. A