Physicians in the Greco-Roman antiquity are difficult to compare with todays. Organised medical education did not exist and, apart from serious physicians, faith healers existed, whom professional physicians had to strive against. Physicians conducted their business as wandering doctors, private doctors, municipal physicians, court physicians or military doctors. In addition to that, there were medical specialists. Even women practised medical professions and also slaves are documented in literature as patients and as doctors. In ancient antiquity physicians were mentioned the first time by Homer, describing wound treatment as their main task. The physician Asklepios was raised to god and his cult characterised the Greek and, finally, the Roman antiquity too and complemented the scientific medicine virtually. Due to Hippocrates medicine, which previously had been a part of philosophy, became a separate branch of science. The Corpus Hippocraticum, an extensive collection of medical documents, developed over several centuries and is still known for its ethics. After Hippocrates there were physicians from Alexandria and several medical schools such as the Empirics, Methodologists and Pneumatics with their respective opinions and focusses. Roman medicine had been a folk medicine for a long time; laymen had healed sick people with domestic remedies. However, despite the aversion of Roman writers to Greek doctors, the Greek doctors introduced their medical knowledge in Rome as immigrants. During antiquity numerous prominent physicians lived and practised in Rome too, for instance Galen. Roman authors proved themselves in scientific writing.