Picture: A ntv · CC BY-SA 3.0 · Wikimedia Commons

Dionysius

Archbishop of Milan (4th c.)

SaintRoman EmpirePre-congregation

Feast: 25 May (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)

Born

—

unknown

Died

360

Beatified

—

not needed: before formal processes

Canonised

By tradition

recognised before formal processes began

Who they were

Dionysius (Italian: Dionigi, died c. 360 AD) was bishop of Milan from 349 to 355. He is honoured as a Saint in the Catholic and Eastern Orthodox churches and his feast day is 25 May.

Summary from Wikipedia (CC BY-SA 4.0), until this page is written up in full.

The miracles

Limited information available on this saint.

Why that counted as sanctity

Limited information available on this saint.

Sources

Wikidata Q3708520 — dates, feast day and identifiers (CC0)
English Wikipedia — Dionysius (bishop of Milan) (CC BY-SA)

Not yet written up in full: no Church source with an account of this person has been found yet. The name, dates and step come from Wikidata and are not yet checked against Church records.