Along with the enigmatic Sphinx and other smaller tombs and monuments ... Built for the 3rd-dynasty pharaoh Djoser in 2650 B.C., the 204-foot structure was built of stone instead of traditional ...

Ancient architects might have designed a hydraulic system to hoist stone blocks, used to assemble the six-tiered, roughly 62-meter-tall pyramid of King Djoser. This proposal, detailed by ...