Henry II (French: Henri II; 31 March 1519 – 10 July 1559) was a monarch of the House of Valois who ruled as King of France from 31 March 1547 until his death in 1559. The second son of Francis I, he became Dauphin of France upon the death of his elder brother Francis III, Duke of Brittany, in 1536. As a child, Henry and his elder brother spent over four years in captivity in Spain as hostages in exchange for their father. Henry pursued his father's policies in matter of arts, wars and religion. He persevered in the Italian Wars against the House of Habsburg and tried to suppress the Protestant Reformation, even as the Huguenot numbers were increasing drastically in France during his reign. The Treaty of Cateau-Cambrésis (1559), which put an end to the Italian Wars, had mixed results: France renounced its claims to territories in Italy, but gained certain other territories, including the Pale of Calais and the Three Bishoprics. France failed to change the balance of power in Europe, as Spain remained the sole dominant power, but it did benefit from the division of the holdings of its ruler, Charles V, and from the weakening of the Holy Roman Empire, which Charles also ruled.

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