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Thalelaeus
ancient Roman physician and Christian martyr
SaintFull write-upAncient RomePre-congregation
Feast: 20 May (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
250
Died
284
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Ayaş in Cilicia, in present-day Turkey, Saint Thalelaeus, 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 20 May as a martyr at Ayaş in Cilicia.
Sources
- Roman Martyrology, 20 May (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q3947991 — dates, feast day and identifiers (CC0)
Checked against the sources listed on 22 September 2026. Corrections welcome.