A massive ancient pyramid and city have been unearthed in China which archeologists believe was constructed around 2000 B.C. by a complex society which represented to political and economic heartland at the time.
According to the report posted on LiveScience.com:
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.
Additionally, the report mentions that “a series of stone walls with ramparts and gates” were included in the city’s design which may have been used as a means of protection and defense.