The Benben stone is an object found in the mythology of ancient Egypt. It is a stone with a conical shape and, according to some theorists, may be of extraterrestrial origin. The Benben stone is also an architectural term, describing the name given to the tip of an obelisk or the capstone placed on top of a pyramid.
The Benben stone is a symbol of the Phoenix, which had the ability to revive itself and be reborn again. It also represents the cycle of the seasons. It was found in the Temple of the Phoenix, which was within the precinct of the Great Sun Temple of Heliopolis. Perhaps the stone was seen by Egyptians as the seed of the legendary bird, since ben meant “fertilization” in their language.