Alfonso I of Aragon

Alfonso I, called the Battler (c. 1073–1134), ruled as king of Aragon and Navarre from 1104, succeeding his brother Peter I. Raised at the monastery of Siresa, he learned letters and military arts.

In 1109 he married Urraca, queen of Castile and León, and claimed the title Emperor of Spain, but the marriage collapsed into years of civil war. His greatest success in the Reconquista was the capture of Zaragoza in 1118.

He died after his defeat at Fraga in 1134, leaving his kingdoms to the military orders, a will his nobility rejected. Aragon and Navarre chose separate kings.