The town gives its name to one of the world's best-known types of
brandy or
eau de vie. Drinks must be made in certain areas around the town of Cognac and must be made according to strictly defined regulations to be granted the name Cognac. Cognac is a unique spirit in that it is double-distilled. This process can be viewed in one of the many "Grande Marque" Cognac houses which all have visitor centres. Most central in the town are
Hennessy,
Martell,
Otard,
Camus and
Remy Martin. About east of Cognac is
Jarnac, home to
Courvoisier. There are six vineyard areas around the Cognac area, all of which are within the Appellation Controlee for Cognac, but which are considered to vary in quality from the best growth area of "Grande Champagne" (nothing to do with the Champagne wine region in NE France), through "Petite Champagne" then "Borderies", "Fins Bois", "Bon Bois" and finally "Bois Ordinaire". All Cognac is produced by blending a variety of
eau de vie which can be made from grapes from different locations, and from different vintages. It is the cellar master's skill that ensures that a brand's Cognac is recognizable regardless of when it is produced, since he can blend multiple
eaux de vie to achieve the right taste for his house. Different qualities of Cognac are produced by all brands, and include VS ("Very Special"); VSOP ("Very Superior [or, more commonly, "Special", though the Bureau National Interprofessionnel du Cognac specifies "Superior"] Old Pale") and XO ("eXtra Old"). (English terms are still used, since in the early days of Cognac production it was the British who were the main consumers and also became some of the main producers of Cognac, using techniques acquired from the distillation of whisky, etc.) These are controlled by the length of time the Cognac is allowed to mature in oak barrels, a minimum time being required at each grade level. The longer the Cognac matures in the barrel the smoother it will generally become. Once it is bottled no further development takes place. Most houses still have barrels of Cognac dating back to the 19th century sitting in their cellars waiting for fine blending by the Cellar Master. ==Climate==