Carol of the Bells - Piano Sheet Christmas folk by Mykola Leontovych

"Carol of the Bells" is a popular Christmas carol famously featuring in the Phantom of the Opera musical, with music by Ukrainian composer Mykola Leontovych in 1914^[1] and lyrics by Peter J. Wilhousky. The song is based on the Ukrainian folk chant "Shchedryk".^[2] The music is in the public domain, Wilhousky's lyrics are however under copyright protection (owned by Carl Fischer Music).

The music is based on a four-note ostinato and is in ³
₄ time signature, with the B-flat bell pealing in ⁶
₈ time. The carol is metrically bistable, and a listener can focus on either measure or switch between them. It has been adapted for many genres, including: classical, metal, jazz, country music, rock, trap, and pop. The piece also features in films, television shows, and parodies.

Source: Wikipedia