Now, the name Teotihuacan, that's not its original name. It's the name given to it by the Aztecs, but it's believed that at its peak, around 400, 450, and remember, this is around the time that it was exerting significant influence over the Mayans, it is believed that it had upwards of 100,000 people living in the city, 100,000 to 200,000, I've even seen some accounts saying 250,000 people, which would have made it, at the time, one of the largest cities in the world. Some accounts have it ranked as the sixth largest city in the world that we know about. Now, one interesting question was, was Teotihuacan an independent city-state by itself, or was it the center of an empire? And this is something that historians debate today. Now, some of the evidence for why it was maybe a center of an empire is it's believed it was a multi-ethnic city. We see its influence over the Mayan cities, especially over Tikal, as we get into the end of the fourth century.