 According to Herodotus (3.131), the physicians of Croton were considered the foremost among the Greeks, and among them Democedes, son of Calliphon, was the most prominent in the 6th century BC.Accordingly, he traveled around Greece and ended up working in the court of Polycrates, tyrant of Samos.After the tyrant was murdered, Democedes was captured by the Persians and brought to King Darius, curing him of a dislocated ankle.