Year 1474 (MCDLXXIV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events December 12 – Upon the death of Henry IV of Castile, a civil war ensues between his designated successor Isabella I of Castile and her sister Juana, who is supported by her husband, Alfonso V of Portugal. Isabella wins the civil war after a lengthy struggle when her husband, Ferdinand II of Aragon, the newly crowned king of Aragon, comes to her aid. Births March… (More on 1474)