King Afonso X of Castile, also known as Afonso the Wise, ruled from 1252 to 1284. He was a significant figure in medieval Spain, known for his contributions to literature, law, and science. Afonso promoted the use of the Spanish language in official documents and was instrumental in the compilation of the Siete Partidas, a comprehensive legal code. Afonso X was also a patron of the arts and sciences, encouraging scholars and poets at his court. His reign saw the flourishing of Jewish and Muslim intellectual traditions, which influenced the cultural landscape of Castile. Afonso's legacy includes his efforts to unify the diverse cultures within his kingdom.