Alfonso XI of Castile

Alfonso XI, known as el Justiciero or the Avenger, was born on August 11, 1311, and ascended to the throne as King of Castile and León following the death of his father, Ferdinand IV, in 1312. His early reign was marked by a power struggle over regency, which was ultimately resolved in 1313.

Upon being declared an adult in 1325, Alfonso XI embarked on a mission to consolidate royal authority. His reign is particularly noted for the significant military victory at the Battle of Rio Salado, which bolstered his reputation as a formidable leader.

Tragically, Alfonso's life was cut short when he succumbed to the plague in Gibraltar while besieging Yusuf I of Granada on March 26, 1350. His legacy as a powerful monarch remains influential in the history of Castile and León.