The Nuttall Encyclopedia
A fortified town of France, on the Aa, 26 m. SE. of Calais; has a fine old Gothic cathedral, a ruined Benedictine abbey church, a Catholic college, arsenal, &c.; manufactures embrace light textiles, tobacco pipes, &c.
Wood, James, ed. Entry for 'St. Omer'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/s/st-omer.html. Frederick Warne & Co Ltd. London. 1900.