- the largest wine-producing district within the Bordeaux region of southwestern France. The district has two main area appellations: Médoc AOC and haut-Médoc AOC. Both appellations produce high-quality red wines, but the wines of Haut-Médoc AOC are generally of slightly better quality because of better-quality soil. The Haut-Médoc AOC covers the entire southern area of the district except for six villages that have their own appellations (Listrac, Margaux, Moulis, Pauillac, Saint-Estèphe, and Saint-Julien). The main red wine grape varieties grown are Cabernet Sauvignon, Merlot, and Cabernet Franc. White wines produced in either area are normally sold under the more generic Bordeaux AOC label. In 1855 the classification of wines in France was limited to the Médoc district, except for one wine from graves, since this was considered at the time to be the only place producing high-quality wine. It still produces some of the best wines in the world.