The winery is located in the municipality of Saint-Estèphe in the Médoc(Bordeaux). Today, the estate covers 100 hectares of land. It is only separated from the famous Château Lafite-Rothschild by a stream. Part of the vineyards were separated in 1789 in connection with the French Revolution, thus founding Château Cos Labory. Château Cos d'Estournel was founded in 1811, when the horse and wine merchant Louis-Gaspard d'Estournel (1753-1844) acquired the first vineyards. He recognised the outstanding quality of the barren pebble soils (Cos) at an early stage. The name part "Cos" (Caux) is derived from "Colline de cailloux" (gravelly hill).
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