Here you have the Danse Macabre, a masterpiece composed by Camille Saint-Saëns for the orchestra, based on a poem from Henri Cazalis (so we can say that's a symphonic poem) The transcription was done by Liszt and this arrangement (harder than the Liszt's one, what isn't small xD) was done by the great Vladimir Horowitz
This masterpiece and the "Godowsky's Studies on Chopin's Études" are the hardest pieces I've ever played.
I hope you like it! I was a hard work! Haha! :P