Louis XIII died 14 May 1643, just five months after Richelieu. His successor, Louis XIV, was just four years old. The King had specifically instructed that his wife, Anne of Austria, not rule in his place as regent. However, as soon as he was dead, she applied to the body of nobles known as the Parliament of Paris, and had his will annulled. She was declared Regent on 18 May. The Queen had a particular dislike of de Chavigny, the other chief advisor chosen by Louis XIII. He had been close to Richelieu and was the only real rival in experience to Mazarin. The evening that she became regent, she declared that Mazarin would be her chief minister and head of her government.