Physiognomy (φυσιογνωμονία), the systematic diagnosis of a man's character from his bodily features, originated as a branch of Greek medicine. True, it had antecedents in Babylonia, but the Babylonian science was more concerned with the prediction of the vicissitudes of a man's life than with deciphering his mental and moral qualities, and even deliverances dealing with such qualities were couched in the omen form. Prophetic physiognomists or metoposcopi held their ground throughout classical antiquity, but it was recognized that there were two classes of physiognomist, the seers and the physicians. The medical science of physiognomy was an attempt to extend the idea of treating a man's visible conditions as signs or symptoms of his invisible state, and to produce a list of signs such that the mind's construction could be inferred when it was not transparent. According to Galen this science was invented by Hippocrates himself, which is likely enough, for physiognomical observations occur in probably authentic Hippo-cratic treatises, and there seem to be none in earlier Greek authors. It was introduced into Athens about the time of Socrates, for the philosopher Antisthenes devoted a treatise to it, and there was a story of a visiting expert's diagnosing Socrates as stupid and fond of women.