The Palermo stone is the largest known fragment of an ancient Egyptian stele containing the earliest extant historic annals. It was engraved around the 25th century BCE and includes a hieroglyphic listing of the kings of ancient Egypt, the years of their reigns, notations of historic events, and information pertaining to the flooding of the Nile. The stone was so named because it is housed in a museum in Palermo, Italy, but small pieces of it are held in what other cities? Discuss