Huexotla is believed to hold vestiges of the most important ancient Acolhuacan reign in the east of the Mexico highlands plateau.

[2] Although a few buildings remain in Huexotla, it was a very large city that extended well beyond the perimeter wall, in fact, the only known structure of its kind in the region from the late postclassical.

Texcoco thereby became the second-most important city in the eventual Aztec empire, by agreement receiving two-fifths of the tribute collected.

Texcoco was known as a center of learning within the empire, and had a famed library including books from older Mesoamerican civilizations.

The Otomi peoples were likely the original inhabitants of the central Mexican highlands before the arrival of Nahuatl speakers around ca.

Although no exact date of the establishment of the first humans in the Texcoco area is available, from historical review it is likely that the first settlers had Teotihuacan or Toltec origins.

Historical sources based on the Xolotl, Tolotzin and Quinatzin codices, among others, indicate that its founders belonged to a Chichimeca group arriving at the Basin of Mexico and established in the province that the Aztecs called Acolhuacán.

[6] Huexotla is a Nahuatl name, that means "place of willows", and it probably makes reference to the forest that existed here during pre-Hispanic times, at the foot of the Tláloc mountain range.

It is likely that the ruling family of the Acolhua were descendants from Otomi speakers and did not speak Nahuatl until decreed by their ruler (tlatoani) Techotlalatzin.

Two hundred years after the arrival of the first Chichimeca groups, the greatest Texcoco ruler was born: Acolmiztli Nezahualcoyotl.

[6] Acolmiztli Nezahualcoyotl gained the favor of the Lords of Huexotzinco and Tlaxcala, as well as his maternal line relatives, the Aztecs and as of year 3 rabbit (1430) he undertook the release of his father's domains that were oppressed by the tepanecas.

His reign lasted over forty years and during that period culture, arts, as well as the building of palaces and temples had a boom.

Sierra Otomí usually self-identify as Ñuhu or Ñuhmu depending on the dialect they speak, whereas Mezquital Otomi selfidentify as Hñähñu (pronounced [ʰɲɑ̃ʰɲũ]).

Otomies traditionally subsisted on maize, beans and squash as most Mesoamerican sedentary peoples, but the maguey (century plant) was also an important cultigen used for production of alcohol (pulque) and fiber (henequen).

The Otomi of the Valle de Mezquital speak nHa:nHu while the Otomi south of Querétaro speak nHa:nHo, together amounting to 300,000 people (some 5 to 6 percent is monolingual), most of whom live in the states of Hidalgo (Valle de Mezquital), México, Puebla, Querétaro, Tlaxcala, Michoacán and Veracruz.

[4] Unfortunately, site investigations were halted a couple of years ago, in spite of the fact that several unexplored mounds are identified in the zone.

[4][12] Among the remaining archaeological vestiges is the Wall constructed between the San Bernardino and Chapingo rivers; the section better preserved is located west of the ex-convent.

[13] The archeological site preserves an enigmatic set of battlement walls built between the San Bernardino and Chapingo rivers; the better-preserved section is west of the former convent.

[1] This platform represents the largest remaining structure, it is oriented east-west measuring some 48 square meters and there are indications of important constructive details.

The North West corner has a lower C-shaped structure about 6 meters below the current terrain, probably an indication of several stages of construction.