Chalcatzingo is a Mesoamerican archaeological site in the Valley of Morelos dating from the Formative Period of Mesoamerican chronology. The site is well known for its extensive array of Olmec-style monumental art and iconography. Located in the southern portion of the Central Highlands of Mexico, Chalcatzingo is estimated to have been settled as early as 1500 BCE. The inhabitants began to produce and display Olmec-style art and architecture around 900 BCE. At its height between 700 BCE and 500 BCE, Chalcatzingo's population is estimated at between five hundred and a thousand individuals.