Teotihuacan, aka birthplace of the gods, is an ancient city where –according to the Aztecs— the GODS created the universe. The early history of this ancient city is filled with enigmas, and its origin and founders are unknown to history. The ancient Teotihuacanos did not leave behind ANY written records, and we have no way of knowing who founded the city, what caused its decline or even what the real name of the place was.
We do know that Teotihuacan was one of the LARGEST pre-Columbian cities in the Americas with an estimated population of around 200,000 people during its peak, meaning that it was among five of the LARGEST cities in the world during its epoch.
Archaeological evidence points towards the fact that Teotihuacan was a multi-ethnic city, with distinct quarters occupied by Otomi, Zapotec, Mixtec, Maya, and Nahua people.
The power of Teotihuacan was felt nearly all Mesoamerican routes, as show the discoveries in cities like Tikal and Monte Albán, among other places that had an important relation with the Teotihuacanos.
While researchers today call the city Teotihuacan, it was NOT the original name of the ancient city. This ancient city was named Teōtīhuacān by Nahuatl-speaking Aztecs centuries after the fall of the city sometime around 550 A.D.