John IV (bishop of Naples)
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Saint John IV (died 835), called the Peacemaker and known in Italian as Giovanni d'Acquarola or Giovanni Scriba, was the Bishop of Naples from an unknown date until his death. He is one of the patron saints of Naples and his feast day is 22 June. He had the relics of Aspren translated to the church of Santa Restituta in Naples. He also assisted Duke Andrew II in negotiating the Pactum Sicardi, an economic treaty, with Sicard, Prince of Benevento.
- Flavia De Rubeis, "Giovanni Scriba, santo", Dizionario Biografico degli Italiani, 56 (Rome: Istituto dell'Enciclopedia Italiana, 2001).
- Bunson, Matthew and Bunson, Stephen. Our Sunday Visitor's Encyclopedia of Saints, Our Sunday Visitor Publishing, 2003 ISBN 9781931709750