 It is also believed that he was incarnated as the Egyptian Pharaoh Amenhotep III (who constructed the Temple of Luxor to the god Amun)  and also as Leonidas, the King of Sparta, who was killed in 480 BC defending the pass of Thermopylae against the invasion of Greece by Emperor Xerxes I of Persia.According to the teachings of Agni Yoga, Serapis Bey was in past lives the Roman King Numa Pompilius, the philosophers Confucius, Plato and Lucius Anneus Seneca.He is referred in the book Supermundane as "The Thinker".