Tequila was first produced in the 16th century near the location of the city of Tequila, which was not officially established until 1656. The Aztec people had previously made a fermented beverage from the agave plant, which they called octli (later, and more popularly called pulque), long before the Spanish arrived in 1521. When the Spanish conquistadors ran out of their own brandy, they began to distill this agave drink to produce North America's first indigenous distilled spirit.
Some 80 years later, around 1600, Don Pedro Sánchez de Tagle, the Marquis of Altamira, began mass-producing tequila at the first factory in the territory of modern-day Jalisco. By 1608, the colonial governor of Nueva Galicia had begun to tax his products.
The tequila that is popular today was first mass-produced in the early 1800s in Guadalajara, Mexico.
Don Cenobio Sauza, founder of Sauza Tequila and Municipal President of the Village of Tequila from 1884-1885, was the first to export tequila to the United States. Don Cenobio's grandson Don Francisco Javier gained international attention for insisting that "there cannot be tequila where there are no agaves!" His efforts led to the practice that real tequila can only come from the State of Jalisco.
Anejo - aged Tequila that has been aged for at least 12 months in oak barrels no larger than 600 liters.
Añejos are often rested in barrels that have been previously used to rest reposados. The barrels cannot be more than 600 liters, although most are stored in barrels of about 200 liters. Many of the barrels used are from whiskey or bourbon distilleries in America, France, or Canada (the most popular being Jack Daniels), resulting in the dark color and more complex flavors of the añejo tequila. Since most people agree that after 4 years of aging the tequila is at its best, the añejo can be removed from the wood barrels and placed in stainless steel tanks to reduce the amount of evaporation that can occur in the barrels.