A 4,300-year-old city, which has
a massive step pyramid that is at least 230 feet (70 meters) high and spans 59 acres (24 hectares) at its base, has been excavated in China, archaeologists reported in the August issue of the journal Antiquity.
The pyramid was decorated with eye symbols and "anthropomorphic," or part-human, part-animal faces. Those figures "may have endowed the stepped pyramid with special religious power and further strengthened the general visual impression on its large audience," the archaeologists wrote in the article. [The 25 Most Mysterious Archaeological Finds on Earth]
For five centuries, a city flourished around the pyramid. At one time, the city encompassed an area of 988 acres (400 hectares), making it one of the largest in the world, the archaeologists wrote. Today, the ruins of the city are called "Shimao," but its name in ancient times is unknown.
The pyramid contains 11 steps, each of which was lined with stone. On the topmost step, there "were extensive palaces built of rammed earth, with wooden pillars and roofing tiles, a gigantic water reservoir, and domestic remains related to daily life," the researchers wrote.