Hippocrates was a Greek physician and the originator of what is now called Hippocratic medicine. In his lifetime he was renowned as a teacher and his younger contemporary Plato makes reference to this in the Asclepiad. Hippocrates is also strongly associated with the Corpus Hippocraticum, a collection of writings which date approximately from the fifth to the third century BC. Whilst the authorship of this work was traditionally attributed to Hippocrates this is now a matter of scholarly debate as the authorship appears to have changed over the period of its composition. However, it is now certain that two of the works are known to have been written by Polybus, Hippocrates’ son-in-law. The collection is significant because it established medicine as a practice separate from philosophy and religion.