structural:summarization, structural:reformatting, structural:expansion, information:highlighting, information:extraction
Manetho is believed to have been an Egyptian priest from Sebennytos who lived in the Ptolemaic Kingdom in the early third century BC, during the Hellenistic period. He authored the Aegyptiaca in Greek, a major chronological source for the reigns of the kings of ancient Egypt. It is unclear whether he wrote his history and king list during the reign of Ptolemy I Soter or Ptolemy II Philadelphos, but it was completed no later than that of Ptolemy III Euergetes.