Reigned from 931 to 936. Born in Rome, Italy; died there. He was elevated to the papacy through the influence of his mother, Marozia, who held immense power in Rome. His brother, Alberic II, angered at his stepfather, Hugh of Provence, overthrew the government and seized absolute control in Rome, 933. Henceforth John was free to perform the sacred duties of his ministry only.