Gallus of Aosta

Holy Hierarch Gallus of Aosta was bishop of Aosta in northern Italy from 528 or 529 until his death on 5 October 546. He may have been prior of the canons of the collegiate church of Sant'Orso. His successor was Bishop Ploceanus.

The dates of his episcopate are preserved in the epitaph found on 15 May 1300 in the cemetery around the church of Saint-⁠Laurent: "Here rests in peace the bishop Gallus of blessed memory"; according to it, he served as bishop for seventeen years, two months and twenty days and was buried on 5 October. The sources give 15 July 529 or 15 October 528 for his consecration. He was invoked as a saint right after his death. He is commemorated on 5 October, by the Western calendar (new style). He is honored as a saint of the undivided Church.