King Alfonso VI was a significant ruler of the Kingdom of León and Castile in the 11th century. He reigned from 1065 to 1109 and is known for unifying these two kingdoms, which strengthened his power in the Iberian Peninsula. His reign was marked by military campaigns against the Moors and efforts to expand Christian territories. Alfonso VI is also remembered for his patronage of culture and the arts, promoting the Spanish language and literature. His court became a center of learning and intellectual exchange, influencing the development of medieval Spain. His legacy includes the establishment of a more unified Christian presence in the region.