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The Arévalo Castle, also known as the Zúñiga castle, is a 15th century fortification, located in Arévalo, north of the Province of Ávila. It was ordered to be rebuilt in the second half of the 15th century by order of Álvaro de Zúñiga, Duke of Béjar, although it subsequently underwent important renovations at the beginning of the 16th century, when the fortress was in the hands of the Catholic Monarchs.

With these changes it went from a square plan to the pentagonal plan that characterizes it. Queen Blanca de Borbón, wife of Pedro I of Castile, lived in this castle. Doña Isabel of Portugal, widowed queen of John II, also lived with her children, Infante Alfonso and Infanta Isabel, future Queen Isabel I of Castile.
