Philip III was the King of Spain from 1598 until his death in 1621. He was born on April 14, 1578, and was the son of Philip II of Spain and Anna of Austria. His reign is often characterized by a focus on peace and stability, although it was also marked by economic difficulties and military challenges. During his rule, Philip III relied heavily on his favorite, the Duke of Lerma, who influenced many of the king's decisions. The period saw the continuation of Spain's involvement in the Thirty Years' War, although Philip III sought to avoid direct conflict. His reign ended on March 31, 1621.