Back Іаан IV Поснік Byelorussian Joan IV de Constantinoble Catalan Jan IV. (patriarcha) Czech Johannes IV. (Patriarch) German Πατριάρχης Ιωάννης Δ΄ Νηστευτής Greek Juan IV de Constantinopla Spanish Johannes Paastoaja Finnish Jean IV le Jeûneur French IV. János konstantinápolyi pátriárka Hungarian Yohanes IV dari Konstantinopel ID
John IV of Constantinople | |
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| Born | Constantinople |
| Died | 2 September 595 Constantinople |
| Venerated in | Eastern Orthodox Church |
| Feast | 2 September |
John IV of Constantinople | |
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| Ecumenical Patriarch of Constantinople | |
| Installed | 11 April 582 |
| Term ended | 595 |
| Predecessor | Eutychius of Constantinople |
| Successor | Cyriacus of Constantinople |
| Personal details | |
| Denomination | Chalcedonian Christianity |
John IV of Constantinople (died 2 September 595), also known as John Nesteutes (Greek: Ἰωάννης Νηστευτής, "Ioannes the Faster"), was the 33rd Patriarch of Constantinople (11 April 582 – 595). He was the first to assume the title Ecumenical Patriarch. He is regarded as a saint by the Eastern Orthodox Church which holds a feast on 2 September.