Duke of Aquitaine House of Valois claimed supremacy over Aquitaine. In 1360, both sides signed the Treaty of Bretigny, in which Edward renounced the French crown but remained sovereign Lord of Aquitaine (rather than merely duke). However, when the treaty was broken in 1369, both these English claims and the war resumed. In 1362, King Edward III, as Lord of Aquitaine, made his eldest son Edward, Prince of Wales, Prince of Aquitaine. In 1390, King Richard II, son of Edward the Black Prince appointed his uncle John of Gaunt Duke of Aquitaine. This grant expired upon the Duke's death, and the dukedom reverted
Investiture of the Prince of Wales The tradition of investing the heir apparent of the English, and subsequently the British, monarch with the title of "Prince of Wales" began in 1301, when King Edward I of England, having completed the conquest of Wales, gave the title to his heir apparent, Prince Edward (later King Edward II of England). Investiture is not necessary to be created Prince of Wales. Peers were also invested, but investitures for peers ceased in 1621, at a time when peerages were being created so frequently that the investiture ceremonies became cumbersome. Most investitures for Princes of Wales were held in front of