The Silures were a powerful and warlike tribe of ancient Britain, occupying approximately the counties of Monmouthshire, Breconshire and Glamorganshire of present day South Wales; and possibly Gloucestershire and Herefordshire of present day England. They were bordered to the north by the Ordovices; to the east by the Dobunni; and to the west by the Demetae.
According to Tacitus's biography of Agricola, the Silures usually had a dark complexion and curly hair. Due to their appearance, Tacitus hinted that they may have crossed over from Spain at an earlier date.
"... the swarthy faces of the Silures, the curly quality, in general, of their hair, and the position of Spain opposite their shores, attest to the passage of Iberians in old days and the occupation by them of these districts; ..." (Tacitus Annales Xi.ii, translated by M. Hutton)
The Iron Age hillfort at Llanmelin near Caerwent has sometimes been suggested as a pre-Roman tribal centre, but the view of most archaeologists is that the people who became known as the Silures were a loose network of groups with some shared cultural values, rather than a centralised society. Although the most obvious physical remains of the Silures are hillforts such as those at Llanmelin and Sudbrook, there is also archaeological evidence of roundhouses at Gwehelog, Thornwell (Chepstow) and elsewhere, and evidence of lowland occupation notably at Goldcliff.
The origin of the name "Silures" itself has been described as "utterly unknown". A 19th-century antiquarian source posits an etymological relationship with Welsh Essyllwg and other forms of identical meaning, such as Essyllyr, meaning "of Essyllt": however, this is now considered unlikely. A more plausible modern etymology would connect 'Silures' to the Common Celtic root *sīlo-, 'seed'. Words derived from this root in Celtic languages (e.g. Old Irish síl, Welsh hil) are used to mean 'blood-stock, descendants, lineage, offspring', as well as 'seed' in the vegetable sense. 'Silures' might therefore mean 'Kindred, Stock', perhaps referring to a tribal belief in a descent from an originating ancestor.[original research?]
Fierce resistance to Roman forces 
The Silures fiercely resisted Roman conquest about AD 48, with the assistance of Caratacus, a military leader and prince of the Catuvellauni, who had fled from further east after his own tribe was defeated.
The first attack on the Welsh tribes was by the legate Publius Ostorius Scapula about AD 48. Ostorius first attacked the Deceangli in the north-east of what is now Wales, who appear to have surrendered with little resistance. He then spent several years campaigning against the Silures and the Ordovices. Their resistance was led by Caratacus, who had fled from the south-east (of what is now England) when it was conquered by the Romans. He first led the Silures, then moved to the territory of the Ordovices, where he was defeated by Ostorius in AD 51.
The Silures were not subdued, however, and waged effective guerilla warfare against the Roman forces. Ostorius had announced that they posed such a danger that they should be either exterminated or transplanted. His threats only increased the Silures' determination to resist and a large legionary force occupied in building Roman forts in their territory was surrounded and attacked, and rescued only with difficulty and considerable loss. They also took Roman prisoners as hostages and distributed them amongst their neighbouring tribes in order to bind them together and encourage resistance.
Ostorius died with the Silures still unconquered and, after his death, they defeated the Second Legion. It remains unclear whether the Silures were actually militarily defeated or simply agreed to come to terms, but Roman sources suggest rather opaquely that they were eventually subdued by Sextus Julius Frontinus in a series of campaigns ending about AD 78. The Roman Tacitus wrote of the Silures: non atrocitate, non clementia mutabatur– the tribe "was changed neither by cruelty nor by clemency".
The town of Venta Silurum (Caerwent, six miles west of Chepstow) was established in AD 75. It became a Romanized town, not unlike Calleva Atrebatum (Silchester), but smaller. An inscription shows that under the Roman Empire it was the capital of the Silures, whose ordo (local council) provided local government for the district. Its massive Roman walls still survive, and excavations have revealed a forum, a temple, baths, amphitheatre, shops, and many comfortable houses with mosaic floors, etc. In the late 1st and early 2nd centuries, the Silures were given some nominal independence and responsibility for local administration. As was standard practice, as revealed by inscriptions, the Romans matched their deities with local Silurian ones, and the local deity Ocelus was identified with Mars, the Roman god of war.
Caerwent seems to have continued in use in the post-Roman period as a religious centre and the territory of the Silures later became the Welsh Kingdom of Gwent, Brycheiniog, Gwynllŵg and Glamorgan. Some theories concerning King Arthur make him a leader in this area. There is evidence of cultural continuity throughout the Roman period, from the Silures to the kingdom of Gwent in particular, as shown by leaders of Gwent using the name "Caradoc" in remembrance of the British hero Caratacus
The term "Silurian" 
Reference is occasionally made to this period of Celtic history by the use of terms such as "Silurian". The poet Henry Vaughan called himself a "Silurist", by virtue of his roots in South Wales. The geologic period Silurian was first described by Roderick Murchison in rocks located in the original lands of the Silures, hence the name. That period postdates the Cambrian and Ordovician periods, whose names are also derived from ancient Wales.
|Wikisource has the text of the 1911 Encyclopædia Britannica article Silures.|
- BBC on Llanmelin
- Miranda Aldhouse-Green and Ray Howell (eds.), Gwent In Prehistory and Early History: The Gwent County History Vol.1, 2004, ISBN 0-7083-1826-6
- John Rhys, Celtic Britain, p.302
- Annals & Antiquities of the Counties and Families of Wales, Glamorganshire