He is best known for his book "Les Propheties" (The Prophecies), which is a collection of over 900 quatrains or four-line poems that he claimed contained predictions of future events. Nostradamus wrote the book in a highly cryptic and metaphorical style, making it open to various interpretations.

The Nostradamus prophecies are said to have included major events such as the Great Fire of London, the French Revolution, the rise of Napoleon Bonaparte, and the assassination of John F. Kennedy. However, many of the predictions are highly ambiguous and have been subject to debate and interpretation over the years.

Nostradamus's methods of prediction included the use of astrology and divination, and he claimed to have had visions that provided him with insights into future events. He also made extensive use of symbolic imagery in his prophecies, which has led some scholars to suggest that his work was more symbolic and allegorical than prophetic.

Despite the controversy surrounding his work, Nostradamus has remained a popular figure in popular culture and continues to inspire books, movies, and other media. Many people still study his writings today in an attempt to find insights into future events. However, his predictions should be taken with a grain of salt, and many experts consider them to be nothing more than vague and ambiguous statements that can be interpreted in a variety of ways.