A red wine blend built around Cabernet Sauvignon, often combined with varieties like Merlot or Cabernet Franc for added complexity.

Château Langoa-Barton (archaically named Pontet Langlois) is a winery in the Saint-Julien appellation of the Bordeaux region of France. Château Langoa-Barton is also the name of the red wine produced by this property. The wine produced here was classified as one of fourteen Troisièmes Crus (Third Growths) in the historic Bordeaux Wine Official Classification of 1855.

Located in the center of the appellation along the banks of the Gironde river, Langoa-Barton has roughly 37 acres (15 ha) under vine. The plantings are divided as follows: 70% Cabernet Sauvignon, 20% Merlot, 8% Cabernet Franc, and 2% Petit Verdot. Typical of the area, the soil composition of the vineyard is composed of a gravel topsoil over a clay sub-stratum.

Château Langoa-Barton shares its cellar with its sibling Château Léoville-Barton, and though the red wines share similar upbringing in the cellar, Langoa-Barton generally ends up as the lighter style of the two.

Bordeaux produces some of the most highly sought after and revered wines in the world. Located close to the coast, in the south-west of France the town and is divided by the Gironde River. Wines to the west of the river are referred to as left bank, and are Cabernet dominant. To the East of the river, on the right bank Merlot is the dominant grape variety. Throughout the 57 appellations, over 10,000 wine-making châteaux grow the red grapes; Cabernet Sauvignon, Merlot, Cabernet Franc, Petit Verdot and Malbec. These are commonly blended and collectively referred to as clarets. Smaller amounts of Semillon and Sauvignon Blanc is also grown in Bordeaux.

In 1855, due to the high export demands of Bordeaux wines, Emporer Napoleon III requested an official Bordeaux classification system, based on market costs of the wines at the time. The Chateaux were classified in to five ‘growths’ from first growth to fifth growth and cru Bourgois. Also in 1855 The Sauternes and Barsac classification covered the sweeter wines, with Chateau d’Yquem the only Superior First Growth, followed by Premiers Crus and Deux Deuxièmes Crus.