ocr: Moreover, the religion of Teotihuacan would have imbued the city's economic institutions with a sacred quality. The various social groups in the city left some evidence of their identity. For example, we located a walled area, associated with the west side of the Pyramid of the Moon, where large quantities of waste obsidian suggest that obsidian workers may have formed part of a larger temple community. We also found what looks like a foreign neighborhood. Occupied by people who apparently came to Teotihuacan from the Valley of Oaxaca, the area lies in the western part of the city. This area h ...