"Carol of the Bells" is a popular Christmas carol composed by Mykola Leontovych in 1904 with lyrics by Peter J. Wilhousky. The song is based on a folk chant known in Ukrainian as "Shchedryk". Wilhousky's lyrics are copyrighted, although the original musical composition is not.
The song is recognized by a four-note ostinato motif (see image to the right). It has been arranged many times for different genres, styles of singing and settings and has been covered by artists and groups of many genres: classical, metal, jazz, rock, and pop. The piece has also been featured in films, television shows, and parodies.