Teotenango was an important pre-Hispanic fortified city located in the southern part of the Valley of Toluca. It was initially founded during the last stages of the Teotihuacan civilization by a group generally referred to as the "Teotenancas." Later, the Matlatzincas conquered the city and expanded it. The city existed for about 1,000 years, being abandoned only after the Spanish Conquest of the Aztec Empire.