Henry was born in the royal Château de Saint-Germain-en-Laye , near Paris , the son of Francis I and Claude , Duchess of Brittany ( daughter of Louis XII of France and Anne , Duchess of Brittany , and a second cousin of her husband ) .His father was captured at the Battle of Pavia in 1525 by the forces of his sworn enemy , Holy Roman Emperor Charles V , and held prisoner in Spain .
Holy Roman Emperor Charles V was Henry II of France ’ s enemy .