Avicenna, also known as Ibn Sina, was a Persian polymath who lived during the Islamic Golden Age. He was a prolific writer and made significant contributions to various fields, including medicine, philosophy, and science. Avicenna's most famous work is "The Canon of Medicine," which became a standard medical text in Europe and the Islamic world for several centuries. His philosophical works also had a profound impact on both Islamic and Western philosophy. Avicenna's influence extended beyond his lifetime, and he is widely regarded as one of the most important figures in the history of medicine and philosophy.