King Afonso III of Portugal reigned from 1248 to 1279. He is known for completing the conquest of the Algarve region from the Moors, which expanded the territory of Portugal. His reign marked a significant period of growth and consolidation for the Portuguese kingdom. Afonso III was the son of Afonso II of Portugal and Urraca of León. He was also known for his efforts to strengthen the monarchy and improve relations with the Catholic Church. His reign laid the groundwork for future developments in Portugal's political and territorial landscape.