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Heliodorus of Altino
bishop of Altinum and saint
SaintFull write-upPre-congregation
Feast: 3 July (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
301
Died
407
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Altino in the Veneto, Saint Heliodorus, bishop, who, trained in the school of Saint Valerian of Aquileia, was a companion of Saints Chromatius and Jerome and was the first bishop of this city.
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 3 July as the first bishop of Altino, trained under Saint Valerian of Aquileia and a companion of Saints Chromatius and Jerome.
Connected on this site
- Liberalis of Treviso Saint“A legend, composed around the 10th century and incorporating elements from other saints' hagiographies, states that Liberalis of Treviso was educated in the Christian faith by Heliodorus.” — Wikipedia
Sources
- Roman Martyrology, 3 July (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q2697454 — dates, feast day and identifiers (CC0)
- English Wikipedia — Heliodorus of Altino (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.