John IV
Pope John IV (Ioannes IV; died 12 October 642) was the bishop of Rome from 24 December 640 to his death on 12 October 642. His election followed a four-month vacancy. He wrote to the clergy of Ireland and Scotland to tell them of the mistakes they were making with regard to the time of keeping Easter and condemned Monothelitism as heresy.
Also recorded as Pope John IV · Ioannes IV · Pope Giovanni IV · Iohannes PP. IV
John IV

Thomas Murner · This image has been extracted from another file · Public domain
- Name
- John IV
- Birthplace
- Iadera, Dalmatia, Eastern Roman Empire
- Died
- 12 October 642
- Place of death
- Vatican, Rome, Italy, Eastern Roman Empire
- Born
- John IV was born in 600. · Dalmatia.
- Nationality
- Byzantine Empire
- Occupation
- western priest · writer
- Languages
- Latin
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Documentary basis
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wikidata · Q199491 · wikipedia · Pope John IV
In this article
Biography
Biography
According to sacred tradition, he created the Catholic Church in Croatia with Abbot Martin.

Calcografia in Giovanni Battista Cavalieri, Pontificum Romanorum effigies, Roma, Basa Domenico\Zanetti Francesco, 1580.
Giovanni Battista de'Cavalieri · This file was uploaded by Biblioteca comunale di Trento.
Key facts
Key facts
• Type — Pope • Honorific Prefix — Pope • Name — John IV • Title — Bishop of Rome • Church — Catholic Church • Term Start — 24 December 640 • Term End — 12 October 642 • Predecessor — Severinus • Successor — Theodore I • Birthplace — Iadera, Dalmatia, Eastern Roman Empire • Died — 12 October 642 • Place of death — Vatican, Rome, Italy, Eastern Roman Empire • Other — John
Rise
Rise
Pope John was a native of Iadera, Dalmatia. 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. John was considered "a very cultured man". As John's consecration on 24 December 640 followed very soon after his election, it is supposed that the elections were being confirmed by the exarch of Ravenna rather than directly by the emperor in Constantinople.
Papacy
Papacy
While still only pope-elect, John, with the other bishops of the Catholic Church, wrote to the clergy of Ireland and Scotland to tell them of the mistakes they were making with regard to the time of keeping Easter, and exhort them to be on their guard against the Pelagian heresy. At about the same time, he condemned Monothelism as heresy. Emperor Heraclius immediately disowned the Monothelite document known as the "Ecthesis". To Heraclius' son, Constantine III, John addressed his apology to Pope Honorius I, in which he deprecated the attempt to connect the name of Honorius with Monothelism. Honorius, he declared, in speaking of one will in Jesus, only meant to assert that there were not two contrary wills in Him. Troubles in his native land caused by the 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 then erected an oratory in their honour. It was adorned by the pope with mosaics depicting John himself holding a model of his oratory in his hands. John endeavoured thereby to convert the Slavs in Dalmatia and Istria to Christianity. Emperor Constantine Porphyrogenitus claimed that Duke Porga of Croatia, archon of White Croats who have 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 was buried in the Basilica of St. Peter.
Identity
Identity
What the record establishes about John IV. John IV is recorded with the occupation Western priest. Recorded as a citizen of Byzantine Empire. Recorded with the occupation writer. Identity and origins. The authorities additionally record the headings Pope John IV, Ioannes IV, Pope Giovanni IV and Iohannes PP. His recorded language was Latin. His recorded confession was Christianity.
Life and career
Dated record
Life and career
The full dated record · 2 entries
600
John IV born at Dalmatia.
642
John IV died at Rome.
Places
Named by the record
Places
Only places the record itself states, plotted where the house gazetteer settles their coordinates. Nothing is inferred from a name or a nationality.
John IV was born at Dalmatia.
Birthplace
John IV died at Rome.
Deathplace
Dalmatia.
Birth place
Rome.
Death place
Text attribution
Licensing
Text attribution
Part of the biographical narrative on this page reuses licensed material. Its origin, revision and licence are recorded here.
The biographical narrative on this page is based on the Wikipedia article Pope John IV, revision 1371743133 (EN edition), by its contributors. VALÉORINE has edited that text and built its own documentary record around it. The reused material is available under CC BY-SA 4.0, and this page's reuse of it is offered under the same licence. Everything else on this page — the chronology, the holdings, the evidence, the plates and the connections — is VALÉORINE's own record. Sources and licences.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.[http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=18281&lang=en Škunca, Stanko Josip. "Pope John IV from Zadar and the Mission of Abbot Martin in 641", Radovi, Institute for Historical Sciences of the Croatian Academy of Sciences and Arts in Zadar, No.48 September 2006. pp. 187-198]
- 2.Miranda, Salvador. "Giovanni", Cardinals of the Holy roman Church, Florida International University
- 3.Mann, Horace. "Pope John IV." The Catholic Encyclopedia Vol. 8. New York: Robert Appleton Company, 1910. 23 September 2017
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Secondary witness
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
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