The Silures were a powerful warrior Brittonic Celtic people of the Isle of Britain, in present-day South Wales, occupying the regions of Gwent, Brecon, and Morgannwg. Their neighbors were the Ordovices and the Demetae. Their habitat consisted of small fortresses.
The Roman historian Tacitus, in his Life of Agricola, describes them as dark-skinned, with curly hair. Around 48, they led a fierce opposition to the Romans, led by Caratacos, leader of the Catuvellauni, who had fled from eastern Britain after the defeat of his people.
From 47, they are in contact with the Roman occupiers, but their submission is not done until around 78.
The Romans built Isca Silurum, Caerleon on their territory.
Their capital, Venta Silurum (Caerwent, 10 km from Chepstow) was Romanised. After the departure of the Romans it became a religious center. The territory of the Silures was divided between the kingdoms of Gwent, Brycheiniog, Gwynllwg and Glamorgan.
According to some theories King Arthur reigned in the region.