Tlatilco archaeological evidence reveal the social development of that culture, prior to the Teotihuacan, Toltec, Chichimeca, and certainly the Aztec.

[3] The Tlatilca civilization –as called by later Nahuatl speaking groups- was a high population center in the early Preclassical period.

[3] It arrived at the place between 1000 and 1200 CE, and settled near where the Aztecs would later build (Postclassical) the structure known today as El Conde.

[9] The archaeological site comprises a rectangular platform, during prehispanic times a tecpan or nobility Palace was built.

The tecpan was one of the most important buildings on mesoamerican communities, because they served as government seats, where administrative activities and meetings of local councils took place, where political decisions were taken.