The "King of Portugal" refers to the monarch who ruled over the Kingdom of Portugal, which existed from 1139 until the establishment of the Portuguese Republic in 1910. The monarchy was characterized by a series of dynasties, including the House of Aviz and the House of Braganza. The kings played significant roles in Portugal's exploration and expansion during the Age of Discoveries. The last king was Manuel II, who reigned from 1908 until the monarchy was abolished in 1910. Following the revolution, Portugal transitioned to a republic, and the royal family went into exile. Today, the legacy of the monarchy is remembered in Portuguese history and culture.