man: this is the political center of teotihuacan. the temple of quetzalcoatl behind us represents the power of the state. the sheer volume of teotihuacan -- of the temples, the hundreds of temples along the street of the dead, the massiveness of the pyramid of the sun, the pyramid of the moon, the temple of quetzalcoatl with its dedicatory burials -- attests to the ability of the state to collect taxes in the form of labor, as well as goods and skills needed to put together and control a city of this size. keach: teotihuacan must have had an extensive bureaucracy. everywhere there is evidence of state management, of control. the layout of the city itself was planned. religious and government buildings line two main avenues, with house compounds arranged behind, in a grid pattern. warren barbour has studied these compounds since 1962. this is the central patio of the apartment compound, called sequala, which is a typical apartment compound at teotihuacan. it's about half a football field on the side. it contains a central patio, a tem