The Harry Simeone Chorale was a 20th-century American music group, best known for their choral renditions of religious and popular music. Founded by conductor and arranger Harry Simeone in 1959, the group gained significant recognition for their influential works such as "The Little Drummer Boy" and "Do You Hear What I Hear?". The Chorale's signature sound was characterized by rich harmonies, orchestral accompaniment, and a focus on traditional and holiday music. Their contributions to the American songbook were significant, especially in popularizing Christmas music in the mid-twentieth century.