Pengwern

thumb|250px|right|Post-Roman Welsh kingdoms or tribes. The modern border between Wales and England is shown in purple. Pengwern was a Brythonic settlement of sub-Roman Britain situated in what is now the English county of Shropshire, adjoining the modern Welsh border. It is regarded as possibly being the early seat of the kings of Powys before its establishment at Mathrafal, further west, but the theory that it was an early kingdom (or a sub-kingdom of Powys itself) has also been postulated. Its precise location is uncertain.

==History and legend== Nothing is known about the foundation of Pengwern, although according to Welsh tradition it was part of the Welsh Kingdom of Powys in the early Middle Ages. Early Powys, much larger in extent than the later medieval kingdom, seems to have roughly coincided with the territory of the Celtic Cornovii tribe, whose civitas under Roman rule (capital or administrative centre) was Viroconium Cornoviorum (now Wroxeter), replacing a fort located on the Wrekin, which was abandoned. Once the Roman legions left the area, Viroconium Cornoviorum had taken control of governing. However, the surrounding pagus (possibly multiple) may have revolted against the rule of Viroconium Cornoviorum, establishing a separate centre of power, which would become Powys. Between 530 and 550, Viroconium Cornoviorum, like many other Roman urban sites and villas in Britain at the time, was abandoned, possibly eventually developing into part of the royal court of Llys Pengwern.