Château d'Yquem is a Premier Cru Supérieur (Fr: "Superior First Growth") wine
from the Sauternes, Gironde region in the southern part of the Bordeaux vineyards known as Graves. In the
Bordeaux Wine Official Classification of 1855, Château d'Yquem was the only Sauternes given this rating,
indicating its perceived superiority and higher prices over all other wines of its type. Yquem's success
stems largely from the site's susceptibility to attack by "noble rot" (a particular kind of infestation by Botrytis cinerea).