Although conclusive evidence is lacking, some scholars agree that the Great Sphinx of Giza was constructed during the reign of the pharaoh Khafra, from 2520 to 2494 B.C. Dissenting Egyptologists suggest that the statue was erected by Khafra's father, Khufu, between 2589 and 2566 B.C.
As evidence, they point to Khafra's Causeway, a walkway built in Khafra's reign that connects the Valley Temple to the Funerary Temple. The causeway is built around the Sphinx, suggesting that the statue was already in place at the time of the causeway's construction. An older theory, widely discredited, suggests that the erection of the Sphinx was at least 2686 B.C. or before. This theory is based on hieroglyphics interpreted from the Inventory Stela, describing the Sphinx, already in existence, being excavated in Khafra's time.