The
Treaty of Alcáçovas (also known as Treaty or
Peace of Alcáçovas-Toledo) was signed on 4 September 1479 between the
Catholic Monarchs of
Castile and
Aragon on one side and
Afonso V and his son,
Prince John of Portugal, on the other side. It put an end to the
War of the Castilian Succession, which ended with a victory of the Catholic Monarchs on land and a Portuguese victory on the sea. The four peace treaties signed at Alcáçovas reflected that outcome:
Isabella was recognized as Queen of Castile while Portugal reached hegemony in the Atlantic Ocean.