Nostradamus was a French astrologer-physician who lived in the 16th century. He is best known for his book Les Propheties, a collection of prophecies that have been studied and interpreted by many people over the centuries. He is also credited with predicting numerous events in world history, including the Great Fire of London in 1666. His predictions have been used to explain many events since his death, and he remains a popular figure in popular culture.