The Acolhua are a Mesoamerican people who arrived in the Valley of Mexico in or around the year 1200 CE. The Acolhua were a sister culture of the Aztecs (or Mexica) as well as the Tepanec, Chalca, Xochimilca and others.
- Smith (1984, p.171), who arrives at this date by averaging six dates mentioned in early codices.
- Davies (1980, p.129); Smith (1984, p.170).
- Evans, Susan T. (1985). "The Cerro Gordo Site: A Rural Settlement of the Aztec Period in the Basin of Mexico". Journal of Field Archaeology. 12 (1): 1–18. doi:10.2307/529371. JSTOR 529371.