The djed is an ancient Egyptian symbol for stability which features prominently in Egyptian art and architecture throughout the country’s history. `Stability’ should be understood to mean not only a firm footing but immutability and permanance. The symbol is a column with a broad base which narrows as it rises to a capital and is crossed by four parallel lines. The column and the lines are sometimes brightly painted and other times monochrome. The djed first appears in the Predynastic Period in Egypt (c. 6000-3150 BCE) and continues through the Ptolemaic Dynasty (323-30 BCE), the last dynasty to rule Egypt before it became a province of the Roman Empire.
The djed is often overlooked in Egyptian art, and especially in architecture, simply because it is so ubiquitous; the djed is featured on pillars, tomb walls, architraves (the main beam which rests on pillars), palace walls, sheets of painted papyrus, and especially sarcophagi. Once one is aware of the djed and its importance to ancient Egyptian culture it is impossible to miss. It is a potent symbol associated with the god Osiris and his return from the dead. The symbol has been interpreted to represent different objects such as the god Osiris’ backbone, the tamarisk tree which enclosed the god, four pillars rising one behind another, and a fertility pole raised at festivals. `Stability’, however, seems to have been its prime meaning and the one which the ancient Egyptians attached the greatest importance to.
The precise origin of the djed is unknown but it was associated with the god Ptah, an early creator god in the Predynastic Period whose attributes were later assumed by the deities Atum and Osiris. According to historian Clare Gibson, the djed was an early phonogram which could also act as a pictogram or ideogram. A phonogram is a symbol representing a sound and a pictogram a symbol for a specific word or phrase while an ideogram is a symbol of a thing itself without reference to words or sounds (such as numerals where one recognizes the symbol 10 as representing a certain quantity). The djed symbolized the spoken word-concept for stability, was the written word for stability, and stood for the concept itself.
Sources: World History Encyclopedia