Sabu Disk: A mysterious 5,000-year-old Egyptian stone sculpture that looks like a hubcap

This delicate stone vessel was discovered in 1936 in the tomb of Sabu, an ancient Egyptian official buried in the Saqqara necropolis during the first dynasty period. When it was found, the disk was in pieces. It has since been reconstructed and is in the collection of the Egyptian Museum in Cairo.Sabu's mastaba, a rectangular tomb with sloping walls and a flat roof, was excavated by British Egyptologist Walter Emery. In his publication describing the Saqqara tombs, Emery wrote that the burial chamber had been looted for its jewelry and precious metals. But Sabu's skeleton was intact inside a wooden...