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Isidore of Pelusium
monk
SaintResearchedByzantine EmpirePre-congregation
Feast: 4 February (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
370
Died
440
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
Isidore, born at Alexandria, left family and goods to become a monk near Pelusium, where he was known for strict observance and austerity, and was probably abbot and priest.
His many letters fight against unworthy clergy, defend the memory of St John Chrysostom and oppose Nestorianism. He died not later than 450.
The miracles
There was never a formal cause: he has been honoured as a saint since before the Church's formal processes began.
Why that counted as sanctity
A monk who defended the faith and the good name of the Church.
Connected on this site
- Cyril of Alexandria Saint“Isidore is known to us for his letters, written to Cyril of Alexandria, Theodosius II, and a host of others.” — Wikipedia
- John Chrysostom Saint“His many letters fight against unworthy clergy, defend the memory of St John Chrysostom and oppose Nestorianism.” — this site's research
- Theodosius II Saint“Isidore is known to us for his letters, written to Cyril of Alexandria, Theodosius II, and a host of others.” — Wikipedia
Sources
- Catholic Encyclopedia (1913), via New Advent - St. Isidore of Pelusium
- Wikidata Q713530 — dates, feast day and identifiers (CC0)
- English Wikipedia — Isidore of Pelusium (CC BY-SA)
Checked against the sources listed on 21 September 2026. Corrections welcome.