Qahedjet could be the Horus name of an ancient Egyptian king (pharaoh), who may have ruled during the 3rd Dynasty or could be a voluntarily archaistic representation of Thutmose III. Since the only artifact attesting to the ruler and his name is a small stela made of polished limestone of uncertain origin and authenticity, Egyptologists are discussing the chronological position and historical figure of Qahedjet.

The Third Dynasty of ancient Egypt is the first dynasty of the Old Kingdom. Other dynasties of the Old Kingdom include the Fourth, Fifth and Sixth. The capital during the period of the Old Kingdom was at Memphis.