The Great Sphinx is a massive limestone statue of a lion with a human head, located near the pyramids of Giza in Egypt. The statue is believed to have been built during the reign of the pharaoh Khafre, who ruled Egypt in the 25th century BC. However, some scholars argue that the statue is much older, potentially dating back to the pre-dynastic period of Egypt around 5000 BC. The lack of inscriptions or other evidence has made it difficult to determine the exact age of the Great Sphinx.