3. THE CATHOLIC MONARCHS -
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DYNASTIC UNION The marriage of Isabel and Fernando of Arag贸n was celebrated in 1469. Few years later, Isabel and Fernando became monarchs. Isabel became Queen Isabel I of Castilla when her brother Enrique IV died (1476). Fernando became king Fernando II of Arag贸n on the death of his father Juan II (1479) The Crowns of Castilla and Arag贸n were united and the monarchs agreed to be joint and equal rulers of both kingdoms. Each kingdom kept its own laws and institutionsunder this dynastic union. Isabel and Fernando received the title of the Catholic Monarchs by the Pope. They created one of the most powerful monarchies in Europe.