 's grandson (the Great, 1173–1240), received the fealty of other Welsh lords in 1216 at the council at , becoming in effect the first Prince of Wales.His grandson also secured the recognition of the title "Prince of Wales" from Henry III with the Treaty of Montgomery in 1267.However, a succession of disputes, including the imprisonment of 's wife Eleanor, daughter of Simon de Montfort, culminated in the first invasion by King Edward I of England.