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John IV (Italian: Giovanni d'Acquarola or Giovanni Scriba; died 17 December 849), also known as the Peacemaker and John the Serene, [1] was an Italian Catholic prelate who served as Bishop of Naples from 26 February 842 until his death.
He had the relics of Aspren translated to a chapel in the church of Santa Restituta in Naples. [2] He also assisted Duke Andrew II in negotiating the Pactum Sicardi , an economic treaty, with Sicard, Prince of Benevento. [3]
He was canonized after his death and is one of the patron saints of Naples. His feast day is 22 June. [4] [5]