Pope John IV (Latin: Ioannes IV; died 12 October 642) reigned from 24 December 640 to his death in 642. His election followed a four-month sede vacante. He became the first of 11 Greek-speaking popes between 640 and 752, who introduced Greek customs and characteristics to the Roman church.
Pope John was a native of Dalmatia (probably in the town of Salona). John was descended from Romans. He was the son of the scholasticus (advocate) Venantius. At the time of his election he was archdeacon of the Roman Church, an important role in governing the see. As John's consecration on 24 December 640 followed very soon after his election, it is supposed that the papal elections were being confirmed by the Exarch of Ravenna rather than by the Emperor in Constantinople.
Troubles in his native land caused by invasions of Slavs directed John's attention there. To alleviate the distress of the inhabitants, John sent the abbot Martin into Dalmatia and Istria with large sums of money for the redemption of captives. As the ruined churches could not be rebuilt, the relics of some of the more important Dalmatian saints were brought to Rome. John erected an oratory in their honour which still stands. It was adorned by the pope with mosaics depicting John himself holding in his hands a model of his oratory. John endeavoured thereby to convert the Slavs in Dalmatia and Istria to Christianity. Emperor Constantine Porphyrogenitus claimed that Porga, duke of the Dalmatian Croats, who had been invited into Dalmatia by Heraclius, sent to Emperor Heraclius for Christian teachers. It is supposed that the Emperor to whom this message was sent was Emperor Heraclius himself, and that he sent it to Pope John IV.
John IV may refer to:
John IV (Portuguese: João IV de Portugal,pronounced: [ʒuˈɐ̃w̃]; 19 March 1604 – 6 November 1656) was the King of Portugal and the Algarves from 1640 to his death. He was the grandson of Catherine, Duchess of Braganza, who had in 1580 claimed the Portuguese crown and sparked the struggle for the throne of Portugal. John IV was nicknamed John the Restorer (João o Restaurador). On the eve of his death in 1656, the Portuguese Empire reached its zenith, spanning the globe. He was one of the main forces behind the independence of Portugal after the Spanish dominance.
John was born at Vila Viçosa and succeeded his father Teodosio II as Duke of Braganza when the latter died insane in 1630. He married Luisa de Guzman (1613–66), eldest daughter of Juan Manuel Pérez de Guzmán, 8th Duke of Medina Sidonia, in 1633.
John had blond hair, blue eyes and an average height.
He was raised to the throne of Portugal (of which he was held to be the legitimate heir) during the revolution on 1 December 1640, against King Philip III.
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.