Trans-Siberian Orchestra (often abbreviated as TSO) is a rock orchestra founded by Paul O'Neill, Robert Kinkel, and Jon Oliva in 1996. The band's musical style is often described in different terms, incorporating progressive rock, symphonic metal, and heavy metal, with influences from classical music. The group is based in New York City, but frequently tours worldwide, bringing their music to sometimes obscure areas. The Trans-Siberian Orchestra is well known for its renditions of traditional Christmas songs. Some of their most well-known works include such songs as Christmas Eve/Sarajevo 12/24 (a rendition of Carol of the Bells), and Wizards in Winter, both of which are popular selections of radio DJs during the Christmas season.