January 20–Ferdinand II already co-ruler of Crown of Castile with his wife, Isabella I, becomes the King of Aragon upon the death of his father, King John II of Aragon and Navarre. He and Isabella rule together over Aragon and Castile, unifying the two monarchies and controlling most of the Iberian Peninsula. At the same time, King John's daughter, Leonor de Trastámara, who had served as regent during times when her father was away fighting in war, becomes Queen of Navarre.
January 28–Leonor de Trastamara, who had served as regent of the Kingdom of Navarre in Spain during the absence of her father, John II, is crowned at Tudela. She dies 15 days later at the age of 53.
March 26– Matthias Corvinus, King of Hungary, concludes a treaty with the Swiss Confederacy hindering the recruitment of Swiss mercenaries by the Emperor.
↑Vicens Vives, Jaume (2003) [1st pub. 1953]. Juan II de Aragón (1398-1479): monarquía y revolución en la España del siglo XV[Juan II of Aragon (1398-1479): Monarchy and Revolution in 15th Century Spain]. Pamplona: Urgoiti Publishing. p.385. ISBN84-932479-8-7.
↑Setton, Kenneth M. (1978). The Papacy and the Levant (1204–1571), Volume II: The Fifteenth Century. Vol.2. Philadelphia: The American Philosophical Society. p.328. ISBN0-87169-127-2.
↑Anthony, R. (1931). Identification et Étude des Ossements des Rois de Navarre inhumés dans la Cathédrale de Lescar[Identification and Study of the Bones of the Kings of Navarre buried in the Cathedral of Lescar]. Archives du Muséum, 6e series (in French). Vol.VII. Masson et Cie. p.10.
↑Orpustan, Jean-Baptiste (2007). La Basse-Navarre dans la guerre de Navarre (1512-1530), récit historique, d'après Navarra, 1512-1530… de Pedro Esarte Muniain (Pamiela, Pamplona-Iruña 2001)[Lower Navarre in the War of Navarre (1512-1530), historical narrative, according to the book 'Navarra, 1512-1530: ...' by Pedro Esarte Muniain (Pamiela, Pamplona-Iruña 2001)] (in French). Osses: Jean-Baptiste Orpustan. p.3.
↑E. Kovács, Péter (1990). Matthias Corvinus (in Hungarian). Officina Nova. p.120. ISBN963-7835-49-0.
12Engel, Pál (translated by Tamas Palosfalvi), The Realm of St Stephen: A History of Medieval Hungary, 895-1526. I.B. Tauris, 2005, p.305 ISBN1-85043-977-X