The Djed symbol is a pillar-like ancient Egyptian symbol representing stability. It has been interpreted as the backbone of the Egyptian god Osiris, especially in the form Banebdjedet (the ba of the lord of the Djedet). Djedu is the Egyptian name for Busiris, a centre of the cult of Osiris. During the Renewal Festival, the djed would be ceremonially raised as a phallic symbol symbolising the “potency and duration of the pharaoh’s rule”. It has been compared to the Sumerian concept of temen. The hieroglyph for “djed” may have given rise to the letter Samekh.
Ptah is also sometimes referred to as the noble Djed.