Nostradamus is best known for his enigmatic predictions encapsulated in his famous work, "Les Prophéties". Through a series of quatrains, he forecasted numerous significant events that would shape history, including the rise and fall of great leaders, natural disasters, and social upheavals. His prophecy of a "young lion" overcoming an older one is often cited as a prediction of the death of King Henri II, where a jousting match led to the monarch's fatal injury. Such interpretations have fueled extensive debate over the veracity and clarity of his predictions, rendering them subjects of fascination for both skeptics and believers.