Picture: Authors of Menologion of Basil II (circa 985 AC, Constantinople), Byzantine manuscript illuminators[1]: Pantoleon with Georgios, Michael the Younger, Michael of · Public domain · Wikimedia Commons
Proculus
Christian martyr
SaintFull write-upAncient RomePre-congregation
Feast: 18 October (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
250
Died
305
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Pozzuoli in Campania, the holy martyrs Proculus, deacon, Eutyches and Acutius.
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 18 October as a deacon martyred at Pozzuoli.
Sources
- Roman Martyrology, 18 October (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q667665 — dates, feast day and identifiers (CC0)
- English Wikipedia — Proculus of Pozzuoli (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.