The oldest tequila Patrón has ever released, Patrón Extra Añejo 7 Años was largely discovered by accident. During a survey of the aging room at the Patrón distillery in the Highlands of Jalisco, Mexico, thirty barrels of tequila were found tucked away. The used French oak barrels, it was learned, had been mistakenly placed in an area usually reserved for old and empty barrels. There they sat, undisturbed, for seven years.