Wales in the Roman era

The history of Wales in the Roman era began in 48 AD with a military invasion by the imperial governor of Roman Britain. The conquest was completed by 78, and Roman rule endured until the region was abandoned in AD 383.
Roman rule in Wales was a military occupation, except for the southern coastal region of South Wales east of the Gower Peninsula, where there is a legacy of Romanisation, and some southern sites such as Carmarthen. The only town in Wales founded by the Romans, Caerwent, is located in South Wales. Wales was a rich source of mineral wealth, and the Romans used their engineering technology to extract large amounts of gold, copper, and lead, as well as modest amounts of some other metals such as zinc and silver.
It is the Roman campaigns of conquest that are most widely known, due to the spirited but unsuccessful defence of their homelands by two native tribes, the Silures and the Ordovices. Aside from the many Roman-related finds along the southern coast, Roman archaeological remains in Wales consist almost entirely of military roads and fortifications.
Wales Before the Roman Conquest..
Archaeologists generally agree that the majority of the British Isles were inhabited by Celts before the Roman invasion. The Romans did not distinguish between the Welsh tribes and all of the other British tribes.
Northern Wales and southern Wales have some notable cultural differences before the Roman invasion, and should not be considered one entity. Southern Wales was advancing along with the rest of Britain throughout the Iron Age, whereas the Northern parts of Wales were conservative and slower to advance. Along with their technological advancement, from the fifth to the first century BC, southern Wales became more heavily and densely populated. Southern Wales had more in common with the north than it did with the rest of Britain, and they saw little outside influence up until the Roman conquest.
Hill forts are one of the most common sites found throughout Iron-Age Wales, and this is what archaeologists mostly rely on for most of their evidence. Nevertheless, due to the relative lack of archaeological activity, survey groupings of these forts throughout Wales can be uneven or misleading. Modern scholars theorize that Wales before the Roman conquest was similar to the rest of Iron Age Britain, however, this is still debated due to the sparsity of evidence. For the most part, the regions' archaeological legacy consists of burials and hill forts, Wales (along with more distant parts of Britain) gradually stopped making pottery throughout the Iron Age (which usually helps archaeologists explore the distant past). However, this is not to say that there was no trade within the region; evidenced by archaeological assemblages (such as the Wilburton complex) suggest that there was trade throughout all of Britain, connecting with Ireland and Northern France.
Britain in AD 47.
On the eve of the Roman invasion of Wales, the Roman military under Governor Aulus Plautius was in control of all of southeastern Britain as well as Dumnonia, perhaps including the lowland English Midlands as far as the Dee Estuary and the River Mersey, and having an understanding with the Brigantes to the north. They controlled most of the island's centers of wealth, as well as much of its trade and resources.
In Wales the known tribes (the list may be incomplete) included the Ordovices and Deceangli in the north, and the Silures and Demetae in the south. Archaeology combined with ancient Greek and Roman accounts have shown that there was exploitation of natural resources, such as copper, gold, tin, lead and silver at multiple locations in Britain, including in Wales. Apart from this we have little knowledge of the Welsh tribes of this era.
Invasion and conquest.
There is uncertainty regarding which parts of Wales were invaded by the Romans prior to the conquest of Anglesey in 60AD. This uncertainty stems from a lack of written source material, with Tacitus as the only written source documenting this period.
Tacitus records that a tribe had attacked a Roman ally in Britain. According to Tacitus, the tribe that was responsible for this incursion was the 'Decangi', scholars associate this tribe with the Welsh Deceangli. The Romans responded swiftly, imposing restrictions upon all of the suspected tribes, then they began to move against the Deceangli. The Roman conquest of this tribe is predicted to have been between the years AD 48 or 49.
Shortly following this, the Romans campaigned against the Silures tribe of south-eastern Wales which must have had previous encounters with the Roman army. Due to the Silures' ferocity and insubordination, the Romans built a legionary fortress to suppress them. The Silures (and later the Ordovices) were led by Caratacus, a king who fled South-eastern England.  Under Caratacus' rule, the Welsh fought the Romans in a pitched battle which resulted in the loss of all the Ordovician territory. This defeat was not crushing, and Caratacus continued to fight the Romans, defeating two auxiliary cohorts. Caratacus fled to the Queen of the Brigantes. Queen Cartimandua was loyal to the Romans and handed Caratacus over to Roman forces 51 AD. While dealing with all of these problems, in 52 AD, Scapula died. This death gave the Silures some time before Scapula's successor, Didius Gallus, would arrive. In that time, the Silures defeated a Roman legion led by Manlius Valens.
In AD 54, emperor Claudius died and was succeeded by Nero. This caused the situation in Britain to change, and Rome began to focus more on consolidating their power in Britain instead of expanding their territory. This is evidenced from the archaeological record, which finds vexillation fortresses (small Roman forts) at the time of Nero's succession.
After a short period of relative inaction, Quintus Veranius became governor of Britain and decided it was time to conquer the rest of the British Isles. Veranius began to campaign against the Silures, but in 58 AD he died, one year after he was appointed to Britain. Suetonius Paulinus was his successor, and it would seem that Veranius had some success in his campaigns because Paulinus began to shift north (suggesting that there was no notable opposition in the south). Paulinus was quite successful in his conquest of northern Wales, and it would seem by 60 AD that he had pushed all the way to the Irish Sea because he was preparing for a conquest of Anglesey.
Anglesey was swelling with migrants fleeing from the Romans, and it had become a stronghold for the Druids. Despite the Romans initial fear and superstition of Anglesey, they were able to achieve victory and subdue the Welsh tribes. However, this victory was short lived and a massive British rebellion led by Boudica erupted in the east and interrupted the consolidation of Wales.
It was not until 74 AD that Julius Frontinus resumed the campaigns against Wales. By the end of his term in 77 AD, he had subdued most of Wales.
Only one tribe was left mostly intact throughout the conquest - the Demetae. This tribe did not oppose Rome, and developed peacefully, isolated from its neighbors and the Roman Empire. The Demetae were the only pre-Roman Welsh tribe to emerge from Roman rule with their tribal name intact.
Wales in Roman Society.
Mining.
The mineral wealth of Britain was well-known prior to the Roman invasion and was one of the expected benefits of conquest. All mineral extractions were state-sponsored and under military control, as mineral rights belonged to the emperor. His agents soon found substantial deposits of gold, copper, and lead in Wales, along with some zinc and silver. Gold was mined at Dolaucothi prior to the invasion, but Roman engineering would be applied to greatly increase the amount extracted, and to extract huge amounts of the other metals. This continued until the process was no longer practical or profitable, at which time the mine was abandoned.
Modern scholars have made efforts to quantify the value of these extracted metals to the Roman economy, and to determine the point at which the Roman occupation of Britain was "profitable" to the Empire. While these efforts have not produced deterministic results, the benefits to Rome were substantial. The gold production at Dolaucothi alone may have been of economic significance.
Industrial production.
The production of goods for trade and export in Roman Britain was concentrated in the south and east, with virtually none situated in Wales.
This was largely due to circumstance, with iron forges located near iron supplies, pewter (tin with some lead or copper) moulds located near the tin supplies and suitable soil (for the moulds), clusters of pottery kilns located near suitable clayey soil, grain-drying ovens located in agricultural areas where sheep raising (for wool) was also located, and salt production concentrated in its historical pre-Roman locations. Glass-making sites were located in or near urban centres.
In Wales none of the needed materials were available in suitable combination, and the forested, mountainous countryside was not amenable to this kind of industrialisation.
Clusters of tileries, both large and small, were at first operated by the Roman military to meet their own needs, and so there were temporary sites wherever the army went and could find suitable soil. This included a few places in Wales. However, as Roman influence grew, the army was able to obtain tiles from civilian sources who located their kilns in the lowland areas containing good soil, and then shipped the tiles to wherever they were needed.
Romanisation.
The Romans occupied the whole of the area now known as Wales, where they built Roman roads and "castra", mined gold at Luentinum and conducted commerce, but their interest in the area was limited because of the difficult geography and shortage of flat agricultural land. Most of the Roman remains in Wales are military in nature. Sarn Helen, a major highway, linked the North with South Wales.
The area was controlled by Roman legionary bases at Deva Victrix (modern Chester) and Isca Augusta (Caerleon), two of the three such bases in Roman Britain, with roads linking these bases to auxiliaries' forts such as Segontium (Caernarfon) and Moridunum (Carmarthen).
Furthermore, South-east Wales was the most Romanised part of the country. It is possible that Roman estates in the area survived as recognisable units into the eighth century: the kingdom of Gwent is likely to have been founded by direct descendants of the (romanised) Silurian ruling class '
The best indicators of Romanising acculturation is the presence of urban sites (areas with towns, "coloniae", and tribal "civitates") and "villas" in the countryside. In Wales, this can be said only of the southeasternmost coastal region of South Wales. The only "civitates" in Wales were at Carmarthen and Caerwent. There were three small urban sites near Caerwent, and these and Roman Monmouth were the only other "urbanised" sites in Wales.
In the southwestern homeland of the Demetae, several sites have been classified as "villas" in the past, but excavation of these and examination of sites as yet unexcavated suggest that they are pre-Roman family homesteads, sometimes updated through Roman technology (such as stone masonry), but having a native character quite different than the true Roman-derived "villas" that are found to the east, such as in Oxfordshire.
Perhaps surprisingly, the presence of Roman-era Latin inscriptions is not suggestive of full Romanisation. They are most numerous at military sites, and their occurrence elsewhere depended on access to suitable stone and the presence of stonemasons, as well as patronage. The Roman fort complex at Tomen y Mur near the coast of northwestern Wales has produced more inscriptions than either Segontium (near modern Caernarfon) or Noviomagus Reginorum (Chichester).
Hill forts.
In areas of civil control, such as the territories of a "civitas", the fortification and occupation of hill forts was banned as a matter of Roman policy. However, further inland and northward, a number of pre-Roman hill forts continued to be used in the Roman Era, while others were abandoned during the Roman Era, and still others were newly occupied. The inference is that local leaders who were willing to accommodate Roman interests were encouraged and allowed to continue, providing local leadership under local law and custom.
Religion.
There is virtually no evidence to shed light on the practice of religion in Wales during the Roman era, save the anecdotal account of the strange appearance and bloodthirsty customs of the druids of Anglesey by Tacitus during the conquest of Wales. It is fortunate for Rome's reputation that Tacitus described the druids as horrible, else it would be a story of the Roman massacre of defenceless, unarmed men and women. The likelihood of partisan propaganda and an appeal to salacious interests combine to suggest that the account merits suspicion.
The Welsh region of Britain was not significant to the Romanisation of the island and contains almost no buildings related to religious practice, save where the Roman military was located, and these reflect the practices of non-native soldiers. Any native religious sites would have been constructed of wood that has not survived and so are difficult to locate anywhere in Britain, let alone in mountainous, forest-covered Wales.
The time of the arrival of Christianity to Wales is unknown. Archaeology suggests that it came to Roman Britain slowly, gaining adherents among coastal merchants and in the upper classes first, and never becoming widespread outside of the southeast in the Roman Era. There is also evidence of a preference for non-Christian devotion in parts of Britain, such as in the upper regions of the Severn Estuary in the 4th century, from the Forest of Dean east of the River Wye continuously around the coast of the estuary, up to and including Somerset.
In the "De Excidio et Conquestu Britanniae", written c. 540, Gildas provides a story of the martyrdom of Saint Alban at Verulamium, and of Julius and Aaron at "Legionum Urbis", the 'City of the Legion', saying that this occurred during a persecution of Christians at a time when 'decrees' against them were issued. Bede repeats the story in his "Ecclesiastical History", written c. 731. The otherwise unspecified 'City of the Legion' is arguably Caerleon, Welsh "Caerllion", the 'Fortress of the Legion', and the only candidate with a long and continuous military presence that lay within a Romanised region of Britain, with nearby towns and a Roman "civitas". Other candidates are Chester and Carlisle, though both were located far from the Romanised area of Britain and had a transitory, more military-oriented history.
A parenthetical note concerns Saint Patrick, a patron saint of Ireland. He was a Briton born c. 387 in "Banna Venta Berniae", a location that is unknown due to the transcription errors in surviving manuscripts. His home is a matter of conjecture, with sites near Carlisle favoured by some, while coastal South Wales is favoured by others.
Irish settlement.
By the middle of the 4th century the Roman presence in Britain was no longer vigorous. Once-unfortified towns were now being surrounded by defensive walls, including both Carmarthen and Caerwent. Political control finally collapsed and a number of alien tribes then took advantage of the situation, raiding widely throughout the island, joined by Roman soldiers who had deserted and by elements of the native Britons themselves. Order was restored in 369, but Roman Britain would not recover.
It was at this time that Wales received an infusion of settlers from southern Ireland, the Uí Liatháin, Laigin, and possibly Déisi, the last no longer seen as certain, with only the first two verified by reliable sources and place-name evidence. The Irish were concentrated along the southern and western coasts, in Anglesey and Gwynedd (excepting the cantrefi of Arfon and Arllechwedd), and in the territory of the Demetae.
The circumstances of their arrival are unknown, and theories include categorising them as "raiders", as "invaders" who established a hegemony, and as "foederati" invited by the Romans. It might as easily have been the consequence of a depopulation in Wales caused by plague or famine, both of which were usually ignored by ancient chroniclers.
What is known is that their characteristically Irish circular huts are found where they settled; that the inscription stones found in Wales, whether in Latin or ogham or both, are characteristically Irish; that when both Latin and ogham are present on a stone, the name in the Latin text is given in Brittonic form while the same name is given in Irish form in ogham; and that medieval Welsh royal genealogies include Irish-named ancestors who also appear in the native Irish narrative "The Expulsion of the Déisi". This phenomenon may however be the result of later influences and again only the presence of the Uí Liatháin and Laigin in Wales has been verified.
End of the Roman era.
Historical accounts tell of the upheavals in the Roman Empire during the 3rd and 4th centuries, with notice of the withdrawal of troops from Roman Britain in support of the imperial ambitions of Roman generals stationed there. In much of Wales, where Roman troops were the only indication of Roman rule, that rule ended when troops left and did not return. The end came to different regions at different times.
Tradition holds that Roman customs held on for several years in southern Wales, lasting into the end of the 5th century and early 6th century, and that is true in part. Caerwent continued to be occupied after the Roman departure, while Carmarthen was probably abandoned in the late 4th century. In addition, southwestern Wales was the tribal territory of the Demetae, who had never become thoroughly Romanised. The entire region of southwestern Wales had been settled by Irish newcomers in the late 4th century, and it seems far-fetched to suggest that they were ever fully Romanised.
However, in the southeast Wales, following the withdrawal of the Roman legions from Britain, the town of Venta Silurum (Caerwent) remained occupied by Romano-Britons until at least the early sixth century: Early Christian worship was still established in the town, that might have had a bishop with a monastery in the second half of that century.
Magnus Maximus
In Welsh literary tradition, Magnus Maximus is the central figure in the emergence of a free Britain in the post-Roman era. Royal and religious genealogies compiled in the Middle Ages have him as the ancestor of kings and saints. In the Welsh story of "Breuddwyd Macsen Wledig" ("The Dream of Emperor Maximus"), he is Emperor of Rome and marries a wondrous British woman, telling her that she may name her desires, to be received as a wedding portion. She asks that her father be given sovereignty over Britain, thus formalising the transfer of authority from Rome back to the Britons themselves.
Historically Magnus Maximus was a Roman general who served in Britain in the late 4th century, launching his successful bid for imperial power from Britain in 383. This is the last date for any evidence of a Roman military presence in Wales, the western Pennines, and Deva (i.e., the entire non-Romanised region of Britain south of Hadrian's Wall). Coins dated later than 383 have been excavated along the Wall, suggesting that troops were not stripped from it, as was once thought. In the "De Excidio et Conquestu Britanniae" written c. 540, Gildas says that Maximus left Britain not only with all of its Roman troops, but also with all of its armed bands, governors, and the flower of its youth, never to return. Having left with the troops and senior administrators, and planning to continue as the ruler of Britain, his practical course was to transfer local authority to local rulers. Welsh legend provides a mythic story that says he did exactly that.
After he became emperor of the Western Roman Empire, Maximus would return to Britain to campaign against the Picts and Scots (i.e., Irish), probably in support of Rome's long-standing allies the Damnonii, Votadini, and Novantae (all located in modern Scotland). While there he likely made similar arrangements for a formal transfer of authority to local chiefs: the later rulers of Galloway, home to the Novantae, would claim Maximus as the founder of their line, the same as did the Welsh kings.
Maximus would rule the Roman West until he was killed in 388. A succession of governors would rule southeastern Britain until 407, but there is nothing to suggest that any Roman effort was made to regain control of the west or north after 383, and that year would be the definitive end of the Roman era in Wales.
Legacy.
Wendy Davies has argued that the later medieval Welsh approach to property and estates was a Roman legacy, but this issue and others related to legacy are not yet resolved. For example, Leslie Alcock has argued that that approach to property and estates cannot pre-date the 6th century and is thus post-Roman.
There was little Latin linguistic heritage left to the Welsh language, only a number of borrowings from the Latin lexicon. With the absence of early written Welsh sources there is no way of knowing when these borrowings were incorporated into Welsh, and may date from a later post-Roman era when the language of literacy was still Latin. Borrowings include a few common words and word forms. For example, Welsh "ffenestr" is from Latin "fenestra", 'window'; "llyfr" is from "liber", 'book'; "ysgrif" is from "scribo", 'scribe'; and the suffix "-wys" found in Welsh folk names is derived from the Latin suffix "-ēnsēs". There are a few military terms, such as "caer" from Latin "castra", 'fortress'. "Eglwys", meaning 'church', is ultimately derived from the Greek "klēros".
Welsh kings would later use the authority of Magnus Maximus as the basis of their inherited political legitimacy. While imperial Roman entries in Welsh royal genealogies lack any historical foundation, they serve to illustrate the belief that legitimate royal authority began with Magnus Maximus. As told in "The Dream of Emperor Maximus", Maximus married a Briton, and their supposed children are given in genealogies as the ancestors of kings. Tracing ancestries back further, Roman emperors are listed as the sons of earlier Roman emperors, thus incorporating many famous Romans (e.g., Constantine the Great) into the royal genealogies.
The kings of medieval Gwynedd trace their origins to the northern British kingdom of Manaw Gododdin (located in modern Scotland), and they also claim a connection to Roman authority in their genealogies ("Eternus son of Paternus son of Tacitus"). This claim may be either an independent one, or was perhaps an invention intended to rival the legitimacy of kings claiming descent from the historical Maximus.
Gwyn A. Williams argues that even at the time of the erection of Offa's Dyke (that divided Wales from medieval England) the people to its west saw themselves as "Roman", citing the number of Latin inscriptions still being made into the 8th century.