Cognac, named after the town of Cognac in France, is a variety of brandy. Produced in the French Departements of Charente and Charente-Maritime. As an Appellation d'origine contrôlée, in order to bear the name Cognac, the production methods for the distilled brandy must meet specified legal requirements. It must be made from certain grapes ; of these, Ugni Blanc, known locally as Saint-Emilion, is the most widely used variety today. It must be distilled twice in copper pot stills and aged at least two years in French oak barrels from Limousin or Tronçais.