Sudbrook, Monmouthshire the Silures from the 2nd century BC and occupied by the Romans from the 1st century AD until the 4th century. The hillfort was originally much bigger than now having been eroded over the centuries. Finds of Roman coins at Black Rock, Portskewett, show that the ferry crossing was in use in Roman times, on the route between the Roman stations of "Aquae Sulis" (Bath) and "Venta Silurum" (Caerwent). According to tradition, Caradog Freichfras, the Welsh ruler of Gwent in the 5th century or 6th century AD, moved his court from Caerwent to the Portskewett area, possibly to the fort.
Christianity in Roman Britain introduced Roman counterparts were venerated in the region, sometimes syncretising together, as in cases like Apollo-Cunomaglus and Sulis-Minerva. Romano-British temples were sometimes erected at locations that had earlier been cultic sites in the pre-Roman Iron Age. A new style of "Romano-Celtic temple" developed which was influenced by both Iron Age and imperial Roman architectural styles but also unique from both; buildings in this style remained in use until the fourth century. The cults of various eastern deities had also been introduced to Roman Britain, among them those of the deities Isis, Mithras, and Cybele; Christianity was just one of these