Picture: Manuel Panselinos · Public domain · Wikimedia Commons
Saint Mercurius
Greek soldier and Christian martyr (died 250)
SaintResearchedAncient RomePre-congregation
Feast: 25 November (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
224
Died
251
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Caesarea in Cappadocia, in present-day Turkey, Saint Mercurius, martyr.
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 25 November as a martyr at Caesarea in Cappadocia.
Sources
- Roman Martyrology, 25 November (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q1285323 — dates, feast day and identifiers (CC0)
- English Wikipedia — Saint Mercurius (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.