Ha! :D
In the Hieronymuss Bosch's "The Garden of Earthly Delights" painting (1480-1490 circa) there is some music written on the butt of one of the characters in hell.
But how sounds this 15th Century melody?
Here is how is the 600-years-old butt music from hell sounds:
Enchanting!
Arranged in the style of the period (the music score on the butt is just a short riff intended to be repeated) and played on Lute, Harp, and Hurdy-Gurdy by James Spalink.
The melody is based on the transcription by Amelia Hamrick.
Hieronymus Bosch Butt Music
http://www.youtube.com/watch?v=OnrICy3Bc2U