Pope Innocent VIII (; ; 1432 – 25 July 1492), born Giovanni Battista Cybo (or Cibo), was head of the Catholic Church and ruler of the Papal States from 29 August 1484 to his death in July 1492. Son of the viceroy of Naples, Battista spent his early years at the Neapolitan court. He became a priest in the retinue of Cardinal Calandrini, half-brother to Pope Nicholas V (1447–55), Bishop of Savona under Pope Paul II, and with the support of Cardinal Giuliano Della Rovere. After intense politicking by Della Rovere, Cibo was elected pope in 1484. King Ferdinand I of Naples had supported Cybo's competitor, Rodrigo Borgia. The following year, Pope Innocent supported the barons in their failed revolt. In March 1489, Cem, the captive brother of Bayezid II, the sultan of the Ottoman Empire, came into Innocent's custody. Viewing his brother as a rival, the Sultan paid Pope Innocent not to set him free. The amount he paid to Pope Innocent was 120,000 crowns (an amount equal to all of the annual revenue to the Vatican) in addition to some holy relics and another sum of money to be paid annually. Any time the Sultan threatened war against the Christian Balkans, Innocent threatened to release his brother. On 28 January 1495, Cem was released by Innocent's successor, Pope Alexander VI, into the custody of King Charles's army; several weeks later he died, possibly after being poisoned, but more likely from contracting pneumonia. Early years Giovanni Battista Cybo was born in Genoa, the son of Arano Cybo and Teodorina de Mari. His father was from an old Genoese family of Greek ancestry, a viceroy of Naples and then a senator in Rome under Pope Calixtus III. Giovanni Battista's early years were spent at the Neapolitan court. While in Naples he was appointed a Canon of the Cathedral of Capua, and was given the Priory of S. Maria d'Arba in Genoa. After the death of King Alfonso (1458), friction between Giovanni Battista and the Archbishop of Genoa induced him to resign his canonry, and to go to Padua and then to Rome for his education. Early career In Rome he became a priest in the retinue of Cardinal Calandrini, half-brother to Pope Nicholas V (1447–55). In 1467, he was made Bishop of Savona by Pope Paul II, but exchanged this see in 1472 for that of Molfetta in south-eastern Italy.