Château Calon-Ségur is an estate located in the commune of Saint-Estèphe on the left bank of the Gironde River in Bordeaux, which was rated as a third growth in the 1855 Classification of the Medoc and Graves. The château is unique in the Medoc as the vineyards are in one single plot surrounded by tall stone walls. The grand vin is predominantly made from Cabernet Sauvignon – in some years the proportion can be as high as 90 percent.Winegrowing here dates back to the 12th Century, but the name, Calon-Ségur, was first seen in the 18th Century. At the time, the château was owned by Nicolas-Alexandre, the Marquis de Ségur, who also owned Châteaux Latour, Lafite and Margaux. The Marquis decided to add his name to the château alongside the word Calon, the name of the small boats that once transferred timber down the Gironde. As well as changing the name of the estate he also placed a heart on the label of his wine, after he famously stated: "I make wine at Lafite and Latour but my heart belongs to Calon." Calon-Ségur's vineyards are planted on clay and gravel soil, giving the finished wines power and finesse. While Cabernet Sauvignon is dominant in the wines, Merlot and Cabernet Franc are planted as well, providing blending opportunities. The grand vin is aged in new oak, fined with egg whites and produced in relatively small quantities – 80,000 bottles – every year. The second wine, Marquis de Calon, is different as it is predominantly Merlot and aged in barrels, only a third of which are new. The production is much higher than the grand vin and it is produced from younger vines, released younger and can be seen as a good introduction to Calon-Ségur.