Assembled between 2630 and 2611 B.C. in Saqqara, Egypt, the pyramid, where Djoser and 11 of his daughters were buried upon their deaths, contains roughly 11.6 million cubic feet of stone and clay. Looping through and around the burial chambers is a winding, maze-like network of tunnels that was likely designed to prevent theft but apparently weakened the building’s structural integrity. – Smithsonian