Barry Castle was owned by William de Barri in the twelfth century, but it was raized to the ground by Llewellyn Bren in 1316. Many believe that the Cavaliers rebuilt and that the Roundheads destroyed it again. Whatever is true, it was never rebuilt again after that.
The Norman interlopers were thoroughly hated by the local people and they had to build large mansions to defend themselves from the not infrequent raids on them by the people of the valleys and the mountains. During the time of the reign of Henry III, there were 12 castles within six miles of Barry; in Glamorgan, there were 30 castles and in South Wales as a whole there were 150 of those symbols of oppression.
Porthkerry and its church which lies on the wooded hill to the west of it are said to have taken their name from Ceri, who, in turn, is said to have founded a port there, ie ‘Port Ceri’. People say that Ceri ap Caid, the King of Essyllwg, lived in Porthkerry before the Christian era and that his bard, Corvinor, was the first to build a ship with sails and a rudder for the ‘race of Cymru’. Some believe that Ceri was a nephew or grandson of Caractacus (Caradog) and that he took over the leadership of the government in South Wales when Caractacus had to journey to Rome.