Château Cos d'Estournel
Château Cos d'Estournel (2. Cru) ligger i syd og er en af Saint Estèphe's stoltheder.
Slottets historie starter i 1791, da Louis Gaspard d'Estournel (1762-1853) arver Cos og Pomys. Desværre nåede Louis ikke at opleve hædren, da slottet i 1855 blev klassificeret som 2. Cru. Han døde kun to år tidligere.
Der produceres vin på 91 ha ud af de 100 ha jorder, der tilhører huset, hvilket giver et årligt udbytte på ca. 215.000 flasker af deres Grand Vin, 1. vinen Château Cos d'Estournel 2. Cru, ca. 165.000 flasker af 2. vinen (Les) Pagodes de Cos og en lille produktion på ca. 3.000 flasker af hvidvinen Cos d'Estournel Blanc på Sauvignon Blanc og Sémillon.
Slottet producerer også vinen Goulée by Cos d’Estournel.
Between Pauillac and Saint-Estèphe, the hill of Cos dominates the Gironde. This location gave its name to the domain; in the old Gascon language, "Cos" means "Hill of Pebbles". The domain inherited its architecture from Louis Gaspard d'Estournel (1762-1853). Having inherited a few vines near the village of Cos, he recognized, in 1811, the quality of their wine. Louis became known as "the Maharajah of Saint-Estèphe". To celebrate his distant conquests, he had exotic pagodas erected over his cellar, organized spectacular festivities at Cos and presented the great people of this world with some precious bottles of Cos "Returned from India". In 1852, overwhelmed with debts he had accumulated in order to extend and beautify his estate, Louis was obliged to sell Cos to a London banker called Martyns. Permitted by Martyns to remain and live on the land he had so much loved, he died there in 1853, two years before the supreme consecration of his work: the imperial classification of 1855 of Cos d'Estournel. Château Cos d'Estournel has belonged to Michel Reybier since 2000. His objective has been to uphold the château's high standards and constant quest for excellence while at the same time continuing the avant-garde style initiated by Louis Gaspard d'Estournel.