Belgic Britain had large centres of population but not towns in the Roman sense of having not merely streets and public buildings but also the amenities and local autonomy of a city. In Britain these had therefore to be provided if Roman civilization and normal methods of provincial administration were to be introduced. Thus a policy of urbanization existed in which the legions, as the nearest convenient source of architects and craftsmen, played an organizing role. The earlier towns consisted of half-timbered buildings; before ad 100 only public buildings seem to have been of stone. The administrative capitals had regular street grids, a forum with basilica (public hall), public baths, and temples; a few had theatres and amphitheatres, too. With few exceptions they were undefended. In the 3rd century, town walls were provided, not so much as a precaution in unsettled times but as a means of keeping operational the earthwork defenses already provided during a crisis at the end of the 2nd century. These towns grew in size to about 100–130 acres with populations of about 5,000; a few were twice this size. The majority of towns in Roman Britain seem to have developed out of traders’ settlements in the vicinity of early garrison-forts: those that were not selected as administrative centres remained dependent for their existence on economic factors, serving either as centres of trade or manufacture or else as markets for the agricultural peasantry. They varied considerably in size. In the north, where garrisons were permanently established, quite large trading settlements grew up in their vicinity, and at least some of these would rank as towns.
Villas
Apart from the exceptional establishment at Fishbourne, in West Sussex, whose Italian style and luxurious fittings show that it was the palace of King Cogidubnus, the houses of Romano-British villas had simple beginnings and were of a provincial type. A few owners were prosperous enough in the 2nd century to afford mosaics; but the great period of villa prosperity lay in the 4th century, when many villas grew to impressive size. Their importance was economic and has already been described. Much remains to be learned from full excavation of their subsidiary work buildings. Larger questions of tenure and organization are probably insoluble in the absence of documentary evidence, for it is dangerous to draw analogies from classical sources since conditions in Celtic Britain were very different from those of the Mediterranean world.
Religion and culture
A great variety of religious cults were to be found. In addition to numerous Celtic deities of local or wider significance, the gods of the classical pantheon were introduced and were often identified with their Celtic counterparts. In official circles the worship of the state gods of Rome and of the imperial cult was duly observed. In addition merchants and soldiers introduced oriental cults, among them Christianity. The latter, however, made little headway until the late 4th century, though the frescoes at Lullingstone in Kent and the mosaics at Hinton St. Mary in Dorset attest its presence among villa owners. Although classical temples are sometimes found in towns, the normal temple was of the Romano-Celtic type consisting of a small square shrine and surrounding portico; temples of this type are found in town and country alike.
Romanization was strongest in the towns and among the upper classes, as would be expected; there is evidence that in the countryside Celtic continued to be spoken, though it was not written. Many people were bilingual: graffiti prove that even artisans wrote Latin. Evidence of the classical education of the villa owners is provided by their mosaics, which prove an acquaintance with classical mythology and even with the
Roman civilization thus took root in Britain; its growth was more obvious in urban circles than among the peasants and weakest in the resistant highland zone. It was a provincial version of Roman culture, but one with recognizably British traits.
The decline of Roman rule