tall, of elegant build; the colour of his hair was between red and gold; his limbs were supple and straight. He had long arms suited to wielding a sword. His long legs matched the rest of his body". Marriage alliances were common among medieval royalty: they led to political alliances and peace treaties and allowed families to stake claims of succession on each other's lands. In March 1159, it was arranged that Richard would marry one of the daughters of Ramon Berenguer IV, Count of Barcelona; however, these arrangements failed, and the marriage never took place. Henry the Young King was married to Margaret, daughter of Louis VII of France, on 2 November 1160. Despite this alliance between the Plantagenets and the Capetians, the dynasty on the French throne, the two houses were sometimes in conflict. In 1168, the intercession of Pope Alexander III was necessary to secure a truce between them. Henry II had conquered Brittany and taken control of Gisors and the Vexin, which had been part of Margaret's dowry. Early in the 1160s there had been suggestions Richard should marry Alys, Countess of the Vexin, fourth daughter of Louis VII; because of the rivalry between the kings of England and France, Louis obstructed the marriage. A peace treaty was secured in January 1169 and Richard's betrothal to Alys was confirmed. Henry II planned to divide his and Eleanor's territories among their three eldest surviving sons: Henry would become King of England and have control of Anjou, Maine, and Normandy; Richard would inherit Aquitaine and Poitiers from his mother; and Geoffrey would become Duke of Brittany through marriage with Constance, heir presumptive of Conan IV. At the ceremony where Richard's betrothal was confirmed, he paid homage to the King of France for Aquitaine, thus securing ties of vassalage between the two. After Henry II fell seriously ill in 1170, he enacted his plan to divide his territories, although he would retain overall authority over his sons and their territories. Young Henry was crowned as heir apparent in June 1170, and in 1171 Richard left for Aquitaine with his mother, and Henry II gave him the duchy of Aquitaine at the request of Eleanor. Richard and his mother embarked on a tour of Aquitaine in 1171 in an attempt to pacify the locals. Together, they laid the foundation stone of St Augustine's Monastery in Limoges. In June 1172, at