The death of Alexander the Great and subsequent related events have been the subjects of debates. According to a Babylonian astronomical diary, Alexander died in the palace of Nebuchadnezzar II in Babylon between the evening of 10 June and the evening of 11 June 323 BC, at the age of 32. Macedonians and local residents wept at the news of the death, while Achaemenid subjects were forced to shave their heads. The mother of Darius III, Sisygambis, having learned of Alexander's death, became depressed and killed herself later. Historians vary in their assessments of primary sources about Alexander's death, which has resulted in different views about its cause and circumstances. Background In February 323 BC, Alexander ordered his armies to prepare for the march to Babylon. According to Arrian, after crossing the Tigris Alexander was met by Chaldeans, who advised him not to enter the city because their deity Bel had warned them that to do so at that time would be fatal for Alexander. The Chaldeans also warned Alexander against marching westwards as he would then look to the setting sun, a symbol of decline. It was suggested that...