How many among those pyramids who'd had their still beating hearts torn out?
Oldest "civilization". What a load.
Teotihuacan (northeast of Mexico City) where this pyramid is located existed around 200 BC to 600AD not much is known about the builders and their civilization, the Aztecs and Tenochtitlan (present day Mexico City) did not really come on the scene until 1200-1300AD. Calling the Pyramid of the Sun pre-Aztec is only correct in that it was built long before the Aztec emergence but that's the only connection.