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
Ancient Rome and wine of Cordoba and the sherry winemaking region of Cádiz. While the Carthaginians and Phoenicians were the first to introduce viticulture to Spain, Rome's influential wine technology and the development of road networks brought new economic opportunities to the region, elevating grapes from a private agricultural crop to an important component of a viable commercial enterprise. Spanish wine was in Bordeaux before the region produced its own. French historian Roger Dion has suggested that the balisca vine (common in Spain's northern provinces, particularly Rioja) was brought from Rioja to plant the first Roman vineyards of Bordeaux. Spanish wines were frequently traded