Isidore I of Constantinople
Ecumenical Patriarch of Constantinople
Church	Church of Constantinople
In office	17 May 1347 – February or March 1350
Predecessor	John XIV of Constantinople
Successor	Callistus I of Constantinople
Personal details
Born	?
Died	February or March 1350

Isidore I (Greek: Ἰσίδωρος; died February or March 1350) was the Ecumenical Patriarch of Constantinople from 1347 to 1350. Isidore Buchiras was a disciple of Gregory Palamas.

Early life

Isidore was an ethnic Greek born in Thessaloniki during the latter part of the 1290s where he became a teacher and spiritual guide.

Career

As a disciple of St. Gregory, he was drawn into the dispute between the followers of Gregory Palamas and Barlaam of Calabria over Hesychasm during the middle decades of the fourteenth century.

Synod of 1344

In 1345, Isidore, who was at the time the bishop elect of Monemvasia, and Gregory Palamas were excommunicated by a synod of anti-hesychast bishops that had been convened by Patriarch John XIV Kalekas who himself was an opponent of St. Gregory.

Palamas and Buchiras recanted.^[1]

Synods of 1347

In February 1347, during a synod convened by emperor John VI Kantakouzenos, Patr. John XIV was deposed and Isidore brought back and elected to succeed John XIV as patriarch of Constantinople. Upon becoming patriarch, Isidore released Gregory Palamas from prison and consecrated him Archbishop of Thessalonica.

Patriarchate

During the two and a half years of his patriarchate, Isidore sought to have the whole Byzantine Church accept the Palamite dogmas. He selected bishops only from the Palamite party. He instituted harsh penalties for those who refused to submit.^[2]

References

^ Fortescue, Adrian (1910), Hesychasm, vol. VII, New York: Robert Appleton Company, retrieved 2008-02-03
^ Jugie, Martin. "The Palamite Controversy". Retrieved 2010-12-28.

3. Evangelos C. Pringipakis, "Patriarch Isidore I Boucheiras (± 1290 - 1350) in the Writtings of Demetrius Cydones", Byzantinos Domos 29 (2021), s. 417-439.

Eastern Orthodox Church titles Preceded byJohn XIV Patriarch of Constantinople 1347–1350 Succeeded byCallistus I

v t e Bishops of Byzantium and Patriarchs of Constantinople
Bishops of Byzantium (Roman period, 38–330 AD)	Andrew Stachys Onesimus Polycarpus I Plutarch Sedecion Diogenes Eleutherius Felix Polycarpus II Athenodorus Euzois Laurence Alypius Pertinax Olympianus Marcus I Philadelphus Cyriacus I Castinus Eugenius I Titus Dometius Rufinus Probus Metrophanes Alexander
Archbishops of Constantinople (Roman period, 330–451 AD)	Alexander Paul I Eusebius Macedonius I Eudoxius Evagrius Demophilus Maximus I Gregory I Nectarius John I Chrysostom Arsacius Atticus Sisinnius I Nestorius Maximianus Proclus Flavian Anatolius
Patriarchs of Constantinople (Byzantine period, 451–1453 AD)	Anatolius Gennadius I Acacius Fravitta Euphemius Macedonius II Timothy I John II Epiphanius Anthimus I Menas Eutychius John III John IV Cyriacus II Thomas I Sergius I Pyrrhus Paul II Peter Thomas II John V Constantine I Theodore I George I Paul III Callinicus I Cyrus John VI Germanus I Anastasius Constantine II Nicetas I Paul IV Tarasius Nicephorus I Theodotus I Antony I John VII Methodius I Ignatios Photios I Stephen I Antony II Nicholas I Εuthymius I Stephen II Tryphon Theophylact Polyeuctus Βasil I Αntony III Nicholas II Sisinnius II Sergius II Eustathius Alexius Michael I Constantine III John VIII Cosmas I Eustratius Nicholas III John IX Leo Michael II Cosmas II Nicholas IV Theodotus II Neophytus I Constantine IV Luke Michael III Chariton Theodosius I Basil II Nicetas II Leontius Dositheus George II John X Michael IV^† Theodore II^† Maximus II^† Μanuel I^† Germanus II^† Methodius II^† Manuel II^† Arsenius^† Nicephorus II^† Germanus III Joseph I John XI Gregory II Athanasius I John XII Nephon I John XIII Gerasimus I Isaias John XIV Isidore I Callistus I Philotheus Macarius Nilus Antony IV Callistus II Matthew I Euthymius II Joseph II Metrophanes II Gregory III Athanasius II
Patriarchs of Constantinople (Ottoman period, 1453–1923 AD)	Gennadius II Isidore II Joasaph I Sophronius I Mark II Symeon I Dionysius I Raphael I Maximus III Nephon II Maximus IV Joachim I Pachomius I Theoleptus I Jeremias I Joannicius I Dionysius II Joasaph II Metrophanes III Jeremias II Pachomius II Theoleptus II Matthew II Gabriel I Theophanes I Meletius I Neophytus II Raphael II Cyril I Timothy II Gregory IV Anthimus II Cyril II Athanasius III Neophytus III Parthenius I Parthenius II Joannicius II Cyril III Paisius I Parthenius III Gabriel II Parthenius IV Dionysius III Clement Methodius III Dionysius IV Gerasimus II Athanasius IV James Callinicus II Neophytus IV Gabriel III Neophytus V Cyprianus Athanasius V Cyril IV Cosmas III Jeremias III (Callinicus III) Paisius II Seraphim I Neophytus VI Cyril V Callinicus IV (III) Seraphim II Joannicius III Samuel Meletius II Theodosius II Sophronius II Gabriel IV Procopius Neophytus VII Gerasimus III Gregory V Callinicus V (IV) Jeremias IV Cyril VI Eugenius II Anthimus III Chrysanthus Agathangelus Constantius I Constantius II Gregory VI Anthimus IV Anthimus V Germanus IV Meletius III Anthimus VI Cyril VII Joachim II Sophronius III Joachim III Joachim IV Dionysius V Neophytus VIII Anthimus VII Constantine V Germanus V Meletius IV
Patriarchs of Constantinople (Turkish period, since 1923 AD)	Gregory VII Constantine VI Basil III Photius II Benjamin Maximus V Athenagoras Demetrius Bartholomew
^† in exile at Nicaea Christianity portal

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