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Gaius of Milan
bishop of Milan
SaintResearchedAncient RomePre-congregation
Feast: 27 September (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
—
unknown
Died
300
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Milan, Saint Gaius, bishop.
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 Roman Martyrology remembers him on 27 September as bishop of Milan.
Sources
- Roman Martyrology, 27 September (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q368382 — dates, feast day and identifiers (CC0)
- English Wikipedia — Caius (bishop of Milan) (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.