Chimalhuacán (Spanish [chimalwaka'n] (help·info)) is an archeological site located in the city and municipality of Chimalhuacán Atenco in the eastern part of Mexico State, Mexico. It lies just outside the northeast border of the Federal District (Distrito Federal). The name derives from the Nahuatl words “chimalli” (shield), hua (possession particle) and can (place), this would mean "Place of Shields".The ancient name of the city by its founders was “Chimalhuacantoyac”.The word Atenco, is also Nahuatl; A, “water”; tentli, “lip” and co, “place”, hence would mean “at the water side”.

• http://en.wikipedia.org/wiki/Chimalhuacán (archaeological site)