Devil's Highway (Roman Britain) From Calleva, this road divided into routes to various other points west, including the road to Aquae Sulis (Bath); Ermin Way to Glevum (Gloucester); and the Port Way to Sorviodunum (Old Sarum near modern Salisbury). After the Roman conquest of Britain in 43 AD an earlier Iron Age settlement developed into the Roman town of Calleva Atrebatum. It was slightly larger, about , and was laid out along a distinctive street grid pattern. The town contained a number of public buildings and flourished until the early Anglo-Saxon period. A large mansio was situated near the South Gate, consisting of three
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