Henry III, 1379–1406, Spanish king of Castile and León (1390–1406), son and successor of John I. His marriage (1388) to Catherine, daughter of John of Gaunt, ended a long dynastic conflict. Henry consolidated royal authority against the nobles. He also sent a fleet that destroyed (1400) Tétouan in N Africa, dispatched envoys to Timur, and sponsored the colonization of the Canary Islands. He was succeeded by his son John II.
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