Archaeologists have discovered the ruins of an 800-year-old Aztec pyramid in the heart of Mexico City that could show the ancient city is at least a century older than previously thought.

The Aztec chose to express their ingenuity largely in the epicenter of Tenochtitlan. Yet the great city was in many ... centerpiece of a double-staircased pyramid with twin temples at its summit.

The Great Pyramid of Khafre The Great Pyramid of Khafre ... ever constructed," according to Guinness. Built to honor the Aztec god Quetzalcoatl, the Cholula pyramid sits atop a hill.