Thelonious Monk was an influential American jazz pianist and composer, known for his unique improvisational style and distinctive approach to music. Born on October 10, 1917, in New York City, Monk became a key figure in the bebop movement, contributing to the development of modern jazz. His compositions, such as "Round Midnight" and "Blue Monk," are considered jazz standards. Monk's playing style was characterized by its use of dissonance, unexpected rhythms, and a strong sense of melody. He often performed with a distinctive posture, emphasizing his individuality. Throughout his career, Monk collaborated with many notable musicians, including John Coltrane and Charlie Parker, leaving a lasting impact on the jazz genre.