The French oenologist and former owner of the winery Bruno Prats has shaped a new quality standard through his activities. In 1970 he inherited the two brothers Château Cos d'Estournel
in Saint-Estèphe and managed it until the year 1998. During this time he achieved by meticulous and uncompromising measures or methods a huge improvement in quality. In the Bordeaux Classification
In 1855, the Château was classified with the second rank (Deuxième Cru Classé). Prat's wine was termed the later-winged term "super-second". This means that he would actually earn the first rank (Premier Cru Classé) because of its high quality. His son Jean Guillaume has followed in his footsteps, he now leads the estate as successor to his father. Bruno Prats always attached great importance to the uniqueness of the origin and the associated philosophy of the unity of soil, climate and grape varieties. For the term terroir
he created a memorable definition. Since the sale of his winery, he has worked worldwide as a consultant or joint venture, including in Portugal at the Port Wine House Symington
, as well as in Chile and South Africa.