To legitimize his rule as Ptolemy I Soter (r. 323–282 BC), he relied, like the other Diadochi, not only on the right of conquest, but also on the supposed legitimate succession of Alexander. Not only did Ptolemy I portray himself as Alexander's closest friend in his historical work, but in 321 BC, he seized his body while Alexander's funeral procession was on its way to Macedon from Babylon, and brought it to the Egyptian capital at Memphis. This claim was particularly useful in Egypt, where Alexander had been greeted as liberator from the Achaemenid Empire (the so-called Twenty-seventh Dynasty) and had been enthroned as Pharaoh and son of the deity Ammon-Ra, receiving divine honours.