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Fridianus
Irish prince and hermit
SaintPre-congregation
Feast: 18 March (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
520
Died
588
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
Fridianus (Italian: San Frediano, also Frigidanus, Frigidian, Frigianu), was an Irish prince and hermit, fl. 6th century. Tradition names him as a son of King Ultach of Ulster. He later migrated to Italy, where he was appointed as Bishop of Lucca. The Basilica of San Frediano in the city is dedicated to him, as are churches in Florence.
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.