King João IV was the King of Portugal from 1640 until his death in 1656. He is best known for restoring Portuguese independence from Spain, which had ruled Portugal for 60 years during the Iberian Union. His reign marked the beginning of the Braganza dynasty, which continued to rule Portugal for over two centuries. João IV was also a patron of the arts and culture, promoting the development of Portuguese music and literature. His government faced challenges, including military conflicts with Spain and internal strife, but he is remembered for his efforts to strengthen the nation and its identity.