ocr: from the street. This pattern was also characteristic of the city's palaces. The residential areas of Teotihuacan must have presented a somewhat forbidding aspect from the outside: high windowless walls facing on narrow streets. Within the buildings, however, the occupants were assured of privacy. Each patio had its own drainage system; each admitted light and air to the surrounding apartments; each made it possible for the inhabitants to be out of doors yet alone. It may be that this architectural style contributed to Teoti- huacan's permanence as a focus of urban life for more than 500 years ...
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