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.
Aquae Iasae part of the Roman settlement was located on the highest terrace of the hill Varaždin spa, today the park and archaeological site. The residential part of "Aquae Iasae" was on the terraces that descend to the foot of the hill in the foothills of the craft-established commercial and trade show facilities. At the end of 3rd century AD Aquae Iasae were ravaged during the incursion of the Goths, then in the beginning of the 4th century the "thermae" were restored by Emperor Constantine. The resort was completely ruined and deserted in the 4th century during the invasions of the Migration