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
Hailes Abbey but these buildings were later demolished and now all that remains are a few low arches in a meadow with outlines in the grass. Surviving remains include the small church for the disappeared parish, with unrestored medieval wall-paintings. The abbey is owned by the National Trust and managed by English Heritage. Outside the remains of the Abbey is Hailes Church. The church is older than the abbey, and was consecrated in 1175. It later served as the Capella Ante Portas to the Abbey until the Abbey's dissolution in 1539. Inside the church are fine medieval wall paintings. The Abbey is