Paracelsus, born Theophrastus Philippus Aureolus Bombastus von Hohenheim (November 11 or December 17, 1493 – September 24, 1541), was a Swiss physician, alchemist, and philosopher. He is often referred to as the father of modern chemistry and is known for establishing the role of chemistry in medicine. Paracelsus emphasized the importance of observation and experience in medicine, and he was the first to correctly describe several diseases, including tuberculosis. His work laid the foundation for the use of chemicals in medical treatments, influencing future generations of physicians and chemists.