Family tour with a native Teotihuacan guide, starting with the living areas for the priests. Learned that the Teotihuacan constructed the site 200-900AD, at which point the city collapse due to bad harvest and disease, survivors moving on to more fertile lands such as Yucatan. The Aztecs arrived after 1300AD, and didn't add much to the pre-existing structures. Impressed by the engineering on square columns, stucco painted with natural pigments, and aqueducts for fresh water and sewage. (Palace of the Jaguars, Teotihuacan, Mexico) 20191223