The complex of defensive earthworks at Castell Dinas cover an area c.363m by 280m and represent the remains of a masonry castle constructed over the site of an Iron Age enclosure (King 1961, 77-8; Kay 1964; RCAHMW 1986, 96-9). The castle is thought to have been constructed in the later twelfth century as it is first mentioned in 1234. It is described in a survey of 1337 (Walker 1999) and is thought to have passed out of use thereafter. Leyland reported that the castle had been destroyed in the reign of Henry IV.

Sources: King 1961 (Brycheiniog 7), 71-94;
Kay 1964 (Brycheiniog 10), 15-27;
RCAHMW 1986 Brecknock I.2;
Walker 1999 (Brycheiniog 31), 19-30.

J.Wiles, RCAHMW, 03 November 2004