<P> Teotihuacanos practiced human sacrifice: human bodies and animal sacrifices have been found during excavations of the pyramids at Teotihuacan . Scholars believe that the people offered human sacrifices as part of a dedication when buildings were expanded or constructed . The victims were probably enemy warriors captured in battle and brought to the city for ritual sacrifice to ensure the city could prosper . Some men were decapitated, some had their hearts removed, others were killed by being hit several times over the head, and some were buried alive . Animals that were considered sacred and represented mythical powers and military were also buried alive, imprisoned in cages: cougars, a wolf, eagles, a falcon, an owl, and even venomous snakes . </P> <P> Numerous stone masks have been found at Teotihuacan, and have been generally believed to have been used during a funerary context, although some scholars call this into question, noting that masks "do not seem to have come from burials". </P> <P> Teotihuacan was a mix of residential and work areas . Upper - class homes were usually compounds that housed many such families, and one compound was found that was capable of housing between sixty and eighty families . Such superior residences were typically made of plaster, each wall in every section elaborately decorated with murals . These compounds or apartment complexes were typically found within the city center . The vast lakes of the Basin of Mexico provided the opportunity for people living around them to construct productive raised beds, or chinampas, from swampy muck, construction that also produced channels between the beds . </P> <P> Different sections of the city housed particular ethnic groups and immigrants . Typically, multiple languages were spoken in these sections of the city . </P>

Who built the pyramids of teotihuacan and where are they located