Daughter, wife, and mother of kings, Berenguela of Castile (1180-1246) was a key figure in the formation of medieval Castile-Le n. Queen of Le n from 1197-1204, regent for Enrique I of Castile briefly in 1214, and then Queen of Castile in her own right after 1217, she secured the thrones of Castile and Le n for her son Fernando III and enabled his crusades in al-Andalus. This study examines Berenguela's use of authority and power, her legitimacy as...