Juan IV was the King of Portugal from 1640 until his death in 1656. He was born on March 18, 1604, and became the first monarch of the House of Braganza. His reign marked the restoration of Portuguese independence from Spain, which had ruled Portugal for 60 years. During his rule, Juan IV focused on strengthening the economy and military of Portugal. He also supported the arts and culture, leading to a flourishing of Portuguese literature and music. His leadership helped to stabilize the nation after a period of turmoil and conflict.