Aragon and Castile joined to form which country?
Maria of Castile, Queen of Aragon his defeat at Ponza in Italy in 1435, she organised the funds to pay his release. On one occasion, Queen Maria of Aragon and Queen Maria of Castile, the two cousins and sisters-in-law, mediated the peace treaty between Aragon and Castile in Valladolid on behalf of their husbands; it was said that there would have been peace in Spain at that time if the Queen of Castile had as much authority as the Queen of Aragon. In 1454, after her brother's death, the Queen of Aragon travelled to Castile to negotiate with its new King, her nephew, Henry IV. She
Maria of Aragon, Queen of Castile Maria of Aragon, Queen of Castile Maria of Aragon (–) was the Queen consort of Castile and Leon as the wife of John II of Castile. She was the daughter of Ferdinand I of Aragon and Eleanor of Alburquerque. Maria was married by her brother in his ambition to place his father's issue on the thrones of Castile and Aragon. The marriage took place in simplicity. Maria was occasionally politically active on behalf of her brothers, the princes of Aragon; she disregarded her husband's policy in favor of her brothers and the relationship between Maria and John was somewhat tense.