it was agreed that Henry and his older brother Francis be sent to Spain in his place. They remained in captivity for over four years. Henry married Catherine de' Medici, a member of the ruling family of Florence, on 28 October 1533, when they were both fourteen years old. The wedding was officiated by Pope Clement VII. At this time, Henry's brother Francis was alive and there was little prospect of Henry coming to the throne. The following year, he became romantically involved with a thirty-five-year-old widow, Diane de Poitiers. Henry and Diane had always been very close: the young lady had fondly embraced Henry on the day he, as a 7-year-old child, set off to captivity in Spain, and the bond had been renewed after his return to France. At the tournament to honor his father's new bride, Eleanor, in 1531, Henry and Francis dressed as chevaliers, and Henry wore Diane's colors. Extremely confident, mature and intelligent, Diane left Catherine powerless to intervene. She did, however, insist that Henry sleep with Catherine in order to produce heirs to the throne. When his elder brother Francis died in 1536 after a game of tennis, Henry became heir apparent to the throne. His attachment to Diane caused a breach with his father in 1544; the royal mistress Anne de Pisseleu d'Heilly persuaded Francis that Henry and Diane were intriguing on behalf of the Constable Montmorency, who had been banished from court in 1540. Francis banished Diane from court. Henry also withdrew to the chateau of Anet; father and son were reconciled in 1545. He succeeded his father on his 28th birthday and was crowned King of France on 25 July 1547 at Reims Cathedral. Reign Attitude towards Protestants Henry's reign was marked by the persecution of Protestants, mainly Calvinists known as Huguenots. Henry II severely punished them, particularly the ministers, for example by burning at the stake or cutting off their tongues for uttering heresies. Henry II was made a Knight of the Garter by Edward VI, King of England, in April 1551. The Edict of Châteaubriant (27 June 1551) called upon the civil and ecclesiastical courts to detect and punish all heretics and placed severe restrictions on Huguenots, including the loss of one-third of their property to informers, and confiscations. The Edict also strictly regulated publications by prohibiting the sale, importation or printing of any unapproved book. It was during