Coin showing Alexander the Great, issued by one of his successors. Neil MacGregor, Director of the British Museum, tells the story of Alexander the Great through a small silver coin that was made years after his death. One of history's most famous leaders, his empire was to stretch from Egypt to northern India and left an impressive legacy on the world today. Political commentator Andrew Marr considers Alexander as a model for future rulers and the historian Robin Lane-Fox explains the motivation behind Alexander's extraordinary ascent. (Duration: 14 mins)