A possible part of Khufu's funerary complex is the famous Great Sphinx of Giza. It's a large limestone statue in the shape of a recumbent lion with the head of a human, decorated with a royal "Nemes" headdress. The Sphinx was directly hewn out of the plateau of Giza and originally painted with red, ocher, green and black. To this day it is passionately disputed as to who exactly gave the order to build it: the most probable candidates are Khufu, his elder son Djedefra and his younger son Khaefra. One of the difficulties of a correct attribution lies in the lack of any perfectly preserved portrait of Khufu. The faces of Djedefre and Khaefra are both similar to that of the Sphinx, but they do not match perfectly. Another riddle is the original cultic and symbolic function of the Sphinx. Much later it was called "Heru-im-Akhet" ("Hârmachís"; "Horus at the horizon") by the Egyptians and "Abu el-Hὀl" ("father of terror") by the Arabians. It might be that the Sphinx, as an allegoric and mystified representation of the king, simply guarded the sacred cemetery of Giza.