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Treaty of Alcáçovas

Portugal [1479]

Quick Summary

The Treaty of Alcáçovas, signed in 1479, was a pivotal agreement between Portugal and Castile. It primarily addressed territorial claims and succession disputes following a period of conflict. The treaty resolved the War of the Castilian Succession, confirming Isabella I as the rightful queen of Castile and abandoning her rival, Afonso V of Portugal's wife, Joan, from her claim to the throne.12

A significant aspect of the treaty was the division of spheres of influence for exploration and trade. Portugal was granted exclusive rights to navigate and trade along the African coast south of the Canary Islands, while Castile was recognized in its claims to the Canary Islands themselves. This division laid the groundwork for future Portuguese exploration and the establishment of its maritime empire.12

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