whether this was out of care for the couple or because of the threat they posed to his own safety remains unclear. The bride, both as sister to Henry and as Dowager Queen of France, had high royal status that could have threatened Wolsey had she so chosen. Wolsey's rise to a position of great secular power paralleled his increasing status in the church. He became a canon of Windsor in 1511. In 1514 he was made Bishop of Lincoln and then Archbishop of York in the same year. Pope Leo X made him a cardinal in 1515, with the titular church of St Cecilia in Trastevere. Following the success of the English campaign in France and the peace negotiations that followed, Wolsey's ecclesiastical career advanced further: in 1523 he became Bishop of Durham, a post with wide political powers, and thus became known as Prince-Bishop of Durham. Foreign policy War with France The Anglo-French War (1512–14) gave Wolsey a significant opportunity to demonstrate his talents in foreign policy. A convenient justification for going to war came in 1511 in the form of a plea for help from Pope Julius II, who was beginning to feel threatened by France. England formed an alliance with Julius, King Ferdinand V of Spain, and Maximilian I, Holy Roman Emperor against King Louis XII of France. The first English campaign against France proved unsuccessful, partly due to the unreliability of the alliance with Ferdinand. Henry learned from the mistakes of the campaign and in 1513, still with papal support, launched a joint attack on France with Maximilian, successfully capturing two French cities and causing the French to retreat. Wolsey's ability to keep a large number of troops supplied and equipped for the duration of the war proved a major factor in the English success. He also had a key role in negotiating the Anglo-French treaty of 7 August 1514, which secured a temporary peace between the two nations. Under this treaty, Louis XII would marry Henry's young sister, Mary. In addition England was able to keep the captured city of Tournai and secure an increase in the annual pension France paid. Meanwhile, a turnover of rulers in Europe threatened to diminish England's influence. With Henry's sister, Mary, married to Louis XII on 9 October 1514, an alliance was formed, but Louis was not in good health. Less than three months later, he died and