Chateau Calon-Segur, located in the Saint-Estephe appellation of Bordeaux, is one of fourteen Troisiemes Crus Classes (Third Growths) in the Bordeaux Wine Official Classification of 1855 and one of the three stars of St. Estephe. In 2012, the estate was sold by longtime owners the Gasqueton family to the large French insurance company, Suravenir (with 5% held by the Moueix family of Petrus fame), and since then the focus has been on an extensive renovation of the wine-making facilities. The 55-hectare vineyard is a single-block parcel just north of the small village of Saint Estephe. The terroir is composed of gravel, rocks, clay, sand, and limestone soils. On average, the vines are 25 years old, with some as old as 60 years of age. Since the vineyard is located in the north of the Saint Estephe appellation, it gets some of the coolest weather in the region, and the grapes tend to ripen later in the season. The juices are then aged for 20 months in oak barrels. Currently, Calon-Segur produces 20,000 cases of wine annually.