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San Proto martire
Christian priest, martyr and saint
SaintFull write-upAncient RomePre-congregation
Feast: 30 May (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
201
Died
—
unknown
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Porto Torres in Sardinia, the holy martyrs Protus, priest, and Januarius, deacon. They were sent to that island by Pope St. Caius and were martyred there in the reign of Diocletian under the governor Barbarus.
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 25 October.
Sources
- The Martyrology of the Order of Friars Preachers (tr. W. R. Bonniwell OP, 1955), 25 October
- Wikidata Q3947856 — dates, feast day and identifiers (CC0)
Checked against the sources listed on 22 September 2026. Corrections welcome.