 Pursuant to an agreement signed by Isabella and Ferdinand on January 15, 1474, Isabella held more authority over the newly unified Spain than her husband, although their rule was shared.Together, Isabella of Castile and Ferdinand of Aragon were known as the "Catholic Monarchs" (), a title bestowed on them by Pope Alexander VI.The monarchs oversaw the final stages of the Reconquista of Iberian territory from the Moors with the conquest of Granada, conquered the Canary Islands, and expelled the Jews from Spain under the Alhambra Decree.