Omer of Thérouanne

Omer of Thérouanne, also called Audomar, was born around 595 near Constance in Switzerland and became a monk at Luxeuil. After some twenty years he was made bishop of Thérouanne in the north of France. To enlighten the region he covered it with monasteries; he himself helped found the monastery of Sithiu, around which grew the town now called Saint-⁠Omer. He reposed around the year 670. He is a saint of the undivided Church, venerated in the West.

His commemoration falls on 9 September (new calendar); the Churches on the Old Calendar keep the same day of the Menaion on 22 September of the civil calendar.