⚔ Battlefields of Britain

Battle of Bryn Derwin 1255

Battle of Bryn Derwin
Image: Eric Jones, CC BY-SA 2.0, via Wikimedia Commons

Marker: recorded battle location (no official boundary).

Key facts

Date (year)1255Wikidata P585 point in time
Century13th centuryderived
PeriodNorman & medievalderived
CountryWalesderived

About the battle

The Battle of Bryn Derwin was fought at Bwlch-derwin in Eifionydd, Gwynedd on June 1255, between Llywelyn ap Gruffudd and his brothers, Dafydd ap Gruffudd and Owain Goch ap Gruffydd.

Llywelyn had ruled over a truncated Kingdom of Gwynedd jointly with Owain since the death of the previous Prince of Wales, Dafydd ap Llywelyn, in 1246, having agreed in the Treaty of Woodstock to split Gwynedd west of the Conwy, but relations between the two men apparently deteriorated in the early 1250s.

The battle lasted for no more than an hour, and resulted in a victory for Llywelyn; Dafydd and Owain were both imprisoned. Dafydd was soon released and went on to play a central role in the royal government of Gwynedd until his defection and subsequent removal to England in the mid-1260s. Llywelyn reluctantly released Owain in 1277 under the terms of the Treaty of Aberconwy, after some 20 years of captivity.

Visiting the battlefield

Location

  • Recorded location (Wikidata; may be approximate): 52.9900, -4.2900

Battlefields are often on private farmland: please keep to public rights of way and respect landowners.

Directions (Google Maps) OpenStreetMap

Text adapted from the Wikipedia article Battle of Bryn Derwin (revision 1370108214), licensed under CC BY-SA 4.0. Changes: excerpted from the article lead section; condensed by selecting paragraphs and trimming at sentence boundaries; citations removed. No text added.

Battle location from Wikidata (CC0).

Further reading