Hyacinthe Eléonore Klosé (1808-1880) was a pioneering French clarinetist, composer, and educator who left an indelible mark on the world of music. Born in Corfu, Greece, and raised in Paris, Klosé's innovative spirit led him to collaborate with instrument maker Louis-Auguste Buffet to develop the modern clarinet, incorporating the ring-key system inspired by Theobald Boehm's flute design. As a professor at the prestigious Conservatoire de Paris, Klosé shared his expertise and passion with generations of students. His contributions to clarinet design and pedagogy, along with his compositions, continue to influence clarinetists and music lovers worldwide. Klosé's legacy is a testament to his dedication to advancing the clarinet and enriching the musical landscape.