Artois.

Chambers's Encyclopaedia, Volume 1: A to Beaufort, p. 469

Artois. an old province in the north of France, bounded by Flanders and Picardy, and almost corresponding with the modern department of Pas-de-Calais. Its capital was Arras. Louis IX. in 1237 made Artois a county, and gave it to his brother Robert. Afterwards it passed into the hands of Flanders and Burgundy, but was ceded to France by treaties in 1659. Charles X., in his early life, and also after his abdication, was known by the title of Count d'Artois.

Source scan(s): p. 0488