Bordeaux wine regions all the producers within a given area: rather, only the producers (universally known as "châteaux", although not usually possessing the architectural grandeur that might imply) perceived as being of an unusually high standard are included in the classification. The châteaux included in the classification are referred to as "classed" or "classé", and those not included are referred to as "unclassed". Some classifications sub-divide the classed châteaux, according to the perceived quality. On the Left Bank, the Bordeaux Wine Official Classification of 1855 is the starting point for classification. Although this purports to be a classification of all Bordeaux wine, it
History of Bordeaux wine Bordeaux's most prestigious estates and Pierre de Rauzan laid the foundation for Château Rauzan-Ségla, Château Rauzan-Gassies, Château Pichon Longueville Baron, and Château Pichon Longueville Comtesse de Lalande. In 1855, a classification system was set up that ranked the top chateaus of the Médoc according to their market price. From 1875–1892 almost all Bordeaux vineyards were ruined by Phylloxera infestations. The region's wine industry was rescued by grafting native vines on to pest-resistant American rootstock from Augusta, Missouri, the first viticultural region in the United States. All Bordeaux vines that survive to this day are thanks to this action. Some grape