Château Cos d’Estournel

The château

Cos is the old Gascon word for a hill of pebbles, and the estate sits on one: a plateau of deep gravel at its core, slopes of gravel and clay falling east and south-southwest, and a vein of clay running diagonally through the vineyard, on which a soil study of 2001 mapped nearly 20 variants. The 100 hectares are about two thirds Cabernet Sauvignon, which holds the top of the plateau, with Merlot on the clay and limestone to the east; the vines average 45 years, and those that go into the first wine 55.

Louis Gaspard d’Estournel inherited Cos in 1791 and took it from 14 hectares to 45. He sold his wine to British officers in India from 1838 and put pagodas over his cellars, and the Bordeaux trade called him a nabob, a word posterity softened into the Maharajah of Saint-Estèphe. The poet Biarnez mocked the buildings in 1849: in vain, he wrote, do minarets raise their oriental brows to the sky; we want great wines, not great buildings. The wine was already answering. William Franck, whose Traité sur les vins du Médoc first appeared in 1824, made it a third growth that year at 1,500 to 1,800 francs the tonneau (the old Bordeaux measure of a crop, 900 liters, or 4 barrels) and a second in his edition of 1845; Charles Cocks, in Bordeaux: Its Wines and the Claret Country of 1846, found the claim more fiercely contested than Pichon’s. In 1852 Cos went to Charles Cecil Martyn of London for 1,150,000 francs, with Pomys, the Abbaye de l’Isle and Bédilloux, an estate of 72 hectares of which 57 were vines, as Cocks and Édouard Féret recorded in their Bordeaux et ses vins of 1868. D’Estournel died in 1853, 2 years before the brokers ranked his wine a Second Growth. Case File 02 reads the books of his lifetime: the trade had moved Cos up a class in 1845, 10 years before the brokers agreed.

Michel Reybier has owned the estate since 2000, with Dominique Arangoïts as technical director. Jérémy Cukierman was made general manager during the 2026 harvest, a post left empty since Aymeric de Gironde went to Troplong Mondot in 2017. The cellars were rebuilt in 2003 with 84 truncated-cone vats and have run on gravity alone since 2008, 4 vats riding in glass elevators so that nothing is pumped between harvest and bottle. Pagodes de Cos is the second wine, and Cos d’Estournel Blanc has been made since 2005.

Two vintages I wrote about in January 2026 show its range. The 2010 is Saint-Estèphe at full stride, confident rather than forceful, built on depth instead of volume. The 2020 is about clarity: vertical and energetic, polished but not glossy, confident but not loud, a modern Cos still anchored in its soil.

At a glance

Appellation

Saint-Estèphe

Classification

Deuxième Cru Classé 1855; Michelin Guide, 1 grape (2026)

Owner

Michel Reybier, since 2000

Direction

Jérémy Cukierman, general manager since the 2026 harvest; Dominique Arangoïts, technical director

Vineyard

100 hectares; vines 45 years old on average, 55 for the first wine

Soil

A plateau of deep gravel, slopes of gravel and clay, a diagonal vein of clay Terroir of Saint-Estèphe →

Grapes

About two thirds Cabernet Sauvignon, with Merlot, Cabernet Franc and Petit Verdot

Cellar

Rebuilt in 2003; 84 truncated-cone vats; all by gravity since 2008, 4 vats in glass elevators

Wines

Château Cos d’Estournel; Pagodes de Cos; Cos d’Estournel Blanc, since 2005

In history

A third growth in 1824, a second in 1845; sold in 1852 for 1,150,000 francs