Francis II of France

Francis II (French: François II; 19 January 1544 – 5 December 1560) was King of France from 1559 to 1560. He was also King consort of Scotland as a result of his marriage to Mary, Queen of Scots, from 1558 until his death in 1560.
He ascended the throne of France at age 15 after the accidental death of his father, Henry II, in 1559. His short reign was dominated by the first stirrings of the French Wars of Religion.
Although the royal age of majority was 14, his mother, Catherine de' Medici, entrusted the reins of government to his wife's uncles from the House of Guise, staunch supporters of the Catholic cause. They were unable to help Catholics in Scotland against the progressing Scottish Reformation, however, and the Auld Alliance was dissolved.
Francis was succeeded by two of his brothers in turn, both of whom were also unable to reduce tensions between Protestants and Catholics.