sentences:  According to much later accounts and reconstructions, of dubious accuracy but which contain some references to verifiable history, the king of Brycheiniog, Bleddyn ap Maenarch, allied with the king of Deheubarth, Rhys ap Tewdwr, in 1093 (or perhaps 1094) and tried to attack the forces of Bernard which were building a castle at Brecon on the Usk and Honddu in the centre of a great plain in his kingdom where several Roman viae met.Bleddyn led a charge up the hill, but the Normans defeated the Welsh and Rhys was killed in battle.Brecknock Priory, which was later founded at the site of the battle, may have been built on the spot where Rhys supposedly fell.