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Theodorus of Nicomedia
SaintFull write-upPre-congregation
Feast: 2 September (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
301
Died
362
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Nicomedia, the holy martyrs Zeno and his sons Concordius and Theodore.
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
The Dominican Martyrology (1955) remembers him on 2 September.
Connected on this site
- Zenon of Nicomedia Saint Parent, Father
Sources
- The Martyrology of the Order of Friars Preachers (tr. W. R. Bonniwell OP, 1955), 2 September
- Wikidata Q16613053 — dates, feast day and identifiers (CC0)
Checked against the sources listed on 22 September 2026. Corrections welcome.