King Alfonso VII of León and Castile, born in 1104, was a significant medieval monarch in Spain. He became the first king to use the title "Emperor of All Spain" after his coronation in 1135. His reign marked a period of territorial expansion and consolidation, as he worked to unify the Christian kingdoms against the Muslim territories in the Iberian Peninsula. Alfonso VII was known for his military campaigns and diplomatic efforts, which strengthened his kingdom. He played a crucial role in the Reconquista, the effort to reclaim land from Muslim rule. His legacy includes the promotion of culture and the establishment of a more centralized government.