Wolfgang Amadeus Mozart (1756-1791) is certainly one of the most famous composers who ever lived. His remarkable life has been well documented in a plethora of biographies, textbooks, and even an award-winning Hollywood biopic (Amadeus). However, many aspects of Mozart’s life remain mysterious to us today. How did a young boy – barely past the toddler phase – demonstrate such facility and creativity at the keyboard? What about Mozart’s unusual sense of humor, which featured a decidedly scatological quality? For many early biographers, this latter point was difficult to manage. As we plunge deeper into Mozart’s life, more mysteries abound. What was the nature of his relationship with Freemasonry, and how does it manifest in his music? Finally, we shall consider what for many is perhaps the greatest mystery in the composer’s life: the story of his Requiem, which remained unfinished at the time of his own death.