Charles of Viana was appointed his fathers governor in Catalonia. Shortly thereafter however, Charles of Viana died. John II proclaimed his son with Juana, Ferdinand, as heir of Aragon. He gave Juana the task to have their son accepted as heir and governor of Catalonia. On 6 February 1462, Juana Enríquez had her son hailed as the heir of Catalonia and his fathers governor of Catalonia. Since her son was a minor, she swore his oath to the Catalonians in his place, and acted as Governor of Catalonia in his place. Accused of having ordered the poisoning of Charles of Viana, Juana fled to Girona, seeking the protection of the bishop. They were besieged in Girona until July 1462. Juana Enríquez was appointed regent of Aragon in March 1465, when her husband was absent in Catalonia, trying to suppress the rebellion. Legacy Queen Juana's greatest wish was to have her son, Ferdinand, married to Isabella, half-sister and heir presumptive of King Henry IV of Castile. Their marriage, which did occur, lasted for 35 years and produced a prince and four queens. However, Juana died on 13 February 1468 from breast cancer, a year before the marriage occurred. Her husband never remarried and reigned until his death in 1479. Her daughter Joanna married Ferdinand I of Naples and thus became Queen of Naples. References External links 1425 births 1468 deaths Juana 15th-century Aragonese nobility 15th-century nobility from the Kingdom of Navarre Aragonese queen consorts Countesses of Barcelona Majorcan queens consort Navarrese royal consorts Royal consorts of Sicily Deaths from breast cancer Deaths from cancer in Spain Burials at the Poblet Monastery 15th-century Spanish women 15th-century women rulers