Teotihuacan

Teotihuacan, Introduction
Teotihuacan means 'The City of the Gods", or "Where Men Become Gods" (in Nahuatl). It is located in the valley of the same name 30 miles north of Mexico City.
Teotihuacanused to be a thriving city and ceremonial center that predated the Aztecs by several centuries. Most likely it was Mexico's biggest ancient city at its peak and the sixth largest city in the world inAD 600.  Teotihuacan began declining sharply around 650 AD, and was almost completely abandoned around 750 AD. No one knows why.
At its peak around 500-600 A.D., Teotihuacan contained perhaps 200,000people. It was a well planned city covering nearly eight square miles and larger and more advanced than any European city of the time. Its civilization was contemporary with that of ancient Rome ,and lasted longer - more than 500 years.
Though archaeologists have long been fascinated with the site, Teotihuacan's culture and history are still largely mysterious. The civilization left massiveruins, but no trace has yet been found of a writing system and very little is known for sure about its inhabitants, who were succeeded first by the Toltecs and then by the Aztecs.
The Aztecs did notlive in the city, but gave the place and its major structures their current names. They considered it the "Place of the Gods" - a place where, they believed, the current world was created.

ThePyramid of the Sun
The Pyramid of the Sun, built in the 2nd century AD, dominates the landscape of the ancient city of Teotihuacan in Mexico.It is the third largest pyramid in the world and the largest inthe Teotihuacan complex. 
This sacred, truncated edifice stood 210 feet high and 650 feet square, a vast pyramid of rubble, adobe mud, and earth all faced with stone. A wooden temple on the summitof the pyramid afforded a spectacular view of the sprawling city below. 
The pyramid is actually a succession of pyramids built one on top the other over the centuries. The pyramids and many other...