Picture: A ntv · CC BY-SA 3.0 · Wikimedia Commons
Protasius
Catholic Archbishop of Milan
SaintResearchedPre-congregation
Feast: 24 November (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
250
Died
344
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Milan, Saint Protasius, bishop, who defended the cause of Saint Athanasius before the Emperor Constans and took part in the Council of Serdica.
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 24 November as a bishop of Milan who defended Saint Athanasius before Constans and attended the Council of Serdica.
Sources
- Roman Martyrology, 24 November (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q1091486 — dates, feast day and identifiers (CC0)
- English Wikipedia — Protasius (bishop of Milan) (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.