The relative chronology of Sahure's reign is well established by historical records, contemporary artifacts and archeological evidence, which agree that he succeeded Userkaf and was in turn succeeded by Neferirkare Kakai. An historical source supporting this order of succession is the "Aegyptiaca" (Αἰγυπτιακά), a history of Egypt written in the 3rd century BC during the reign of Ptolemy II (283–246 BC) by Manetho. No copies of the Aegyptiaca have survived and it is now known only through later writings by Sextus Julius Africanus and Eusebius. According to the Byzantine scholar George Syncellus, Africanus wrote that the "Aegyptiaca" mentioned the succession "Usercherês → Sephrês → Nefercherês" at the start of the Fifth Dynasty. Usercherês, Sephrês (in Greek, Σϵϕρής), and Nefercherês are believed to be the Hellenized forms for Userkaf, Sahure and Neferirkare, respectively. Manetho's reconstruction of the early Fifth Dynasty is in agreement with those given on two more historical sources, the Abydos king list where Sahure's cartouche is on the 27th entry, and the Saqqara Tablet where Sahure's name is given on the 33rd entry. These lists of kings were written during the reigns of Seti I and RamsesII, respectively.