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Glycerius of Nicomedia
SaintFull write-upDate unknown
Feast: 21 December (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
—
unknown
Died
—
unknown
Beatified
—
not on record
Canonised
—
not on record
Who they were
At Nicomedia, St. Glycerius, priest. In the persecution of Diocletian, he was tested by many tortures and at last thrown into the fire, thus gaining his martyrdom.
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 21 December.
Sources
- The Martyrology of the Order of Friars Preachers (tr. W. R. Bonniwell OP, 1955), 21 December
- Wikidata Q112691936 — dates, feast day and identifiers (CC0)
Checked against the sources listed on 22 September 2026. Corrections welcome.