Clos is a French term meaning enclosed, it is a walled vineyard with a resulting improved and warmer microclimate, conferring a unique character to its grapes. The word is often used in the name of famous vineyards, even when the wall no longer exists. There are 31 clos in Champagne for a total of just 35 ha, which is about 0.1% of its total planted vineyard. Probably the most famous clos in Champagne is Clos du Mesnil in Le Mesnil-sur-Oger grand cru, in the Côte des Blancs, of 1.8 ha planted with chardonnay, after which the iconic champagne Krug Clos du Mesnil is named.
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