Hippocrates of Kos, also known as Hippocrates II, was a Greek physician of the classical period who is considered one of the most outstanding figures in the history of medicine. He is traditionally referred to as the "Father of Medicine" in recognition of his lasting contributions to the field, such as the use of prognosis and clinical observation, the systematic categorization of diseases, and the formulation of humoral theory. The Hippocratic school of medicine revolutionized ancient Greek medicine, establishing it as a discipline distinct from other fields with which it had traditionally been associated, thus establishing medicine as a profession.
A conventionalized image in a Roman "portrait" bust (19th-century engraving)
Illustration of the story of Hippocrates refusing the presents of the Achaemenid Emperor Artaxerxes, who was asking for his services. Painted by Girodet, 1792.
Asklepieion on Kos
A number of ancient Greek surgical tools. On the left is a trephine; on the right, a set of scalpels. Hippocratic medicine made good use of these tools.
Humorism, the humoral theory, or humoralism, is a system of medicine detailing a supposed makeup and workings of the human body, adopted by Ancient Greek and Roman physicians and philosophers.
16th-century German illustration of the four humors: Flegmat (phlegm), Sanguin (blood), Coleric (yellow bile) and Melanc (black bile), divided between the male and female sexes
The four humors as depicted in an 18th-century woodcut: phlegmatic, choleric, sanguine and melancholic