Venta Belgarum 144 acres (58 ha), making it among the largest towns in Roman Britain by surface area. The city had many fine Roman town houses or "domus", as well as public buildings and Roman temples. Like many other Roman towns however, Winchester began to decline in the later fourth century. The forum-basilica appears to have included a temple to Jupiter, Juno and Minerva along with an accompanying Jupiter Column. Elsewhere, there was a Romano-British style temple dedicated to the Celtic horse goddess, Epona. There was a large Romano-British cemetery to the north of the town, at Lankhills, and another to the
England–Wales border Silures, traditionally the area between the rivers Usk, Wye and the Severn estuary. It was centred at different times on "Venta" (Caerwent), from which it derived its name, and "Isca Augusta" (Caerleon). Gwent generally allied with, and at various times was joined with, the smaller Welsh kingdom of Ergyng, centred in present-day southern Herefordshire west of the Wye (and deriving its name from the Roman town of "Ariconium"); and the larger kingdom of Glywysing in modern Glamorgan. The name Glywysing may indicate that it was founded by a British native of "Glevum" (Gloucester). The Battle of Mons Badonicus, circa 500,