Thelonious Monk was an American musician born on October 10, 1917. He is considered one of the greatest jazz pianists and composers in history. Monk's unique style combined complex harmonies and rhythms, creating a distinctive sound that influenced many musicians. He is best known for compositions like "Round Midnight" and "Blue Monk." Monk's contributions to jazz have earned him numerous awards and recognition, and he remains an iconic figure in the world of music.