Saint Diego or Saint Didacus may refer to:
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Didacus of Alcalá (d. 1463), missionary to the Canary Islands
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Juan Diego
Juan Diego Cuauhtlatoatzin, also known as Juan Diego (; 1474–1548), was a Chichimec peasant and Marian visionary. He is said to have been granted apparitions of the Virgin Mary on four occasions in December 1531: three at the hill of Tepeyac a ...
(d. 1548), first Native American Catholic saint
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