Maurice de Berkeley 1243 and, on 14 December 1243, he had livery of his father's lands. He fought in the war in North Wales and in 1264 he joined the Barons against King Henry III. Berkeley died on 4 April 1281 and was buried in St Augustine's Abbey in Bristol. Maurice de Berkeley Sir Maurice de Berkeley "the Resolute" (1218 - 4 April 1281), 5th (feudal) Baron de Berkeley, was an English soldier and rebel, residing at Berkeley Castle in the English county of Gloucestershire. Maurice was born in 1218 to Thomas de Berkeley and Joan de Somery. He married Isabel FitzRoy, the
Dysart Castle house. In this third period, the place was the childhood home of philosopher George Berkeley (1685–1753). Due to degradation of structures, Dysart is now considered a romantic ruin. In April 2003, The Irish Times published an urgent appeal for assistance for restoration of Dysart Castle and cited the risk of "imminent collapse" following the emergence of new cracks in the walls of the castle; previously conservation work had been conducted with the aid of Kilkenny County Council acting for the Department of the Environment and private efforts. Dysart Castle Dysart Castle is a castle ruins and property just outside Thomastown