Brecon (brĕkˈən) [key] or Brecknock brĕkˈnŏk, –nək, town (1981 pop. 7,422), Powys, S Wales, at the junction of the Honddu and Usk rivers. It is a market for the surrounding agricultural and cattle-raising area. Brecon was founded by the Normans c.1091. In the town are fragments of an 11th-century castle; Christ College, founded by Henry VIII in 1542; and the 11th-century priory church of St. John, which became a cathedral in 1923.