By comparison, John Williams' 18-hour composition to Star Wars features about fifty themes overall, and other film compositions (such as James Horner's Titanic) featuring but a handful, thereby making Shore's work on the Lord of the Rings films by far the most thematically-rich of any cinematic work, and when coupled with his work on The Hobbit trilogy, even rivals Wagner's Ring catalogue of leitmotifs, making it not only the most thematically complex film score but one of the most leitmotifically-nuanced works in the history of orchestral music.