The Castle of Arevalo, locally known as Castillo de Arevalo, is located not far from the meeting of the Adaja and Arevalillo rivers in the north of the province of Avila in Spain. It is said that it was built in the 14th century by King Pedro I, the Cruel, who locked his wife. Doña Blanco de Bourbon, in it. Shortly after it was given to Don Alvaro de Zuñiga, along with the title of Duke, by King Enrique IV as a reward for his loyalty.