Established for the purposes of a presentation of the wines from the Gironde, for the Universal Exhibition of Paris, it was at the request of Emperor Napoleon 111. The setting up of the classification was entrusted to the “Syndicat des Courtiers de Commerce” (Association of Trade Merchants) of the Bordeaux Stock Exchange by the Bordeaux Chamber of Commerce. Its mission was to make an official classification based on many years’ experience and which corresponded to the quality of the terroir and the reputation of each château. The deciding factors were derived from the best sources. Published on 18th April 1855 the Classification was thus the accumulating point in representing the market realities and the evolution that had existed for more than a century.