Who built and lived in Teotihuacan, the most impressive pre-Columbian Mesoamerican city?

Mayans
1489
Aztecs
2577
Incas
1170
it is not known
1899
The city is ancient - its largest pyramid, the Pyramid of the Sun, was completed by AD 100. It predates most known cultures of Mesoamerica. The origin of its founders is uncertain, and its original name is also unknown. It housed a population of about 150,000 people, making it one of the largest cities in the world at that time.
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