The Greek doctor Hippocrates of Kos (ca. 460–370 BC) made symptom-related diagnosis the basis of medicine and ascribed great ethical responsibility to the activities of doctors, as reflected up to the present in the Hippocratic Oath of medical practitioners.
Peter Paul Rubens (1577–1640), Hippocrates of Kos (ca. 460–370 BC), copperplate engraving of a sculpture by P. Pontius, 1638; source: Wellcome Collection, https://wellcomecollection.org/works/py3bf6hb, public domain.