Edward the Black Prince large sum of money from them, and seized many houses and much land into the prince's, their earl's, hands. On his return from Chester the prince is said to have passed by the Abbey of Dieulacres in Staffordshire, to have seen a fine church which his grandfather, Edward I, had built there, and to have granted five hundred marks, a tenth of the sum he had taken from his earldom, towards its completion; the abbey was almost certainly not Dieulacres but Vale Royal. When Edward III determined to renew the war with France in 1355, he ordered the Black Prince
Edward the Black Prince differenced royal arms. His younger brother, John of Gaunt, used a similar shield on which the ostrich feathers were ermine. Edward's "shield for peace" is believed to have inspired the badge of three ostrich feathers used by later Princes of Wales. Edward married his cousin, Joan, Countess of Kent (1328–1385), on 10 October 1361. She was the daughter and heiress of Edmund, Earl of Kent, the younger son of King Edward I by his second wife Margaret of France. They had two sons, both born in Aquitaine: From his marriage to Joan, he also became stepfather to her children by