This is one of the greatest estates in St Estephe. The Chateau borders Lafite Rothschild and is known as a 'super second', a second growth estate that makes wine that is often of first growth quality. It is owned by the Ginestet and Prats families and run by the charismatic Bruno Prats. The vineyard is planted with 60% Cabernet Sauvignon, 38% Merlot and 2% Cabernet Franc. Two wines are produced: Chateau Cos d'Estournel and Pagodes de Cos.