Just outside of present day Mexico City, a civilization developed known as the Teotihuacanos. This people built a massive capital city that at its height had more than 200,000 inhabitants. This city was expertly laid out, with wide streets, town squares, markets and plazas.
This massive city had over 600 pyramids, which were believed to be used for religious purposes. It also had well over 2000 apartment buildings where many of the people of this civilization lived.
The Teotihuacanos thrived for nearly 750 years. Then, in 750 A.D., invaders from the north, known as the Toltecs, conquered and destroyed them.