Paracelsus

Paracelsus, whose full name was Philippus Aureolus Theophrastus Bombastus von Hohenheim, was a Swiss physician, alchemist, and philosopher who lived from 1493 to 1541. He is often regarded as one of the founders of modern medicine, especially for his contributions to toxicology and the use of chemicals in medicine. Paracelsus challenged the traditional medical practices of his time, which were heavily influenced by Galenic theories of humors.