A classification of the different vintages of Champagne was established by professional bodies at the beginning of the 20th century. This classification, called the "cru scale", values the villages from 80 to 100%. Currently among the 319 wine-growing villages, which are as many delimited vintages, that account for Champagne, only 17 of them benefit from the 100% value which is equivalent to the Grand Cru appellation.
Le Mesnil-sur-Oger and Oger, terroirs of Maison Charlemagne, are two prestigious Grands Crus from the Champagne vineyard, where Chardonnay is king. These two Grands Crus 100% from the Côte des Blancs are characterized by an east-south-east exposure and are based on chalky soil. The latter provides Chardonnay with a regular water regime which will give the Grand Cru cuvées finesse, elegance and minerality.
Only the best localities are selected for the production of Grand Cru cuvées such as Chétillon, Coullemets, Vaucherots, Mont-Joly, Aillerand du Midi, etc. The average age of the vines on these plots reaches 42 years. This mosaic of micro-terroirs makes it possible to obtain champagnes with strong typicity.