What is Saint-Joseph AOC?

Saint-Joseph or St.-Joseph is a French wine Appellation d'Origine Contrôlée in the northern Rhône wine region of France. Though the appellation covers the largest amount of land, it is second in actual size under vine to Crozes-Hermitage, an appellation with which it shares much regarding style and prestige. St.-Joseph is primarily a red wine region, but also produces a white wine. The red is produced predominantly from the Syrah grape, but AOC regulations allow up to 10% of Marsanne or Roussanne. The white wine is made exclusively from the latter grape varieties.