ALFONSO XI, king of Castile and León. B. 1311, d. 1350. He was called the Justicier for his terrible vengeance against his enemies, but his passion for Eleanor of Guzmán and for their natural children brought discord to the kingdom. He was very fortunate in the war against the Moors, on whom he won the victory of Salado, a mortal blow to Islam (1340).
BIBL.: P. de Sandoval, *Historia de los reyes de Castilla y León*, Madrid 1792; C. Rosell, *Crónicas de los Reyes de Castilla*, in *Biblioteca de Autores españoles*, LXVI, Madrid 1875; A. Ballesteros, *Historia de España y su influencia en la historia universal*, III, Barcelona 1920, pp. 43-58; B. Sánchez Alonso, *Fuentes de la historia española e hispano-americana*, 2nd ed., Madrid 1927, pp. 1370-79.