In foreign policy, Francis II continued peace efforts Henry II had begun with the signing of the Peace of Cateau-Cambrésis in April 1559, which ended 40 years of war between France and the Habsburg empire. By the autumn of 1559, France had completely left Savoy, and Piedmont, except for the five locations agreed upon in the Peace of Cateau-Cambrésis. On 23 December 1560, Francis II's body was interred in the Basilica of St Denis by the Prince of La Roche-sur-Yon. Francis II, eldest son of Henry II and Catherine de' Medici, reigned as king of France for only seventeen months in 1559-1560, and as the husband of Mary, Queen of Scots he was also king consort of Scotland. Francis became king on July 10, 1559, at fifteen, after his father's death from a jousting wound. Although he was legally of age, real power passed to his wife's uncles, Francis, Duke of Guise, and Charles, Cardinal of Lorraine. The Guises' hard line against Protestants provoked the Conspiracy of Amboise in March 1560, a failed Huguenot plot to seize the king and remove them from power. Many conspirators were executed, and religious tensions grew. Late in 1560 Francis developed an ear infection that spread. He died at Orléans on December 5, 1560, and his younger brother Charles IX succeeded him, with Catherine de' Medici as regent.