Still one of my favorite pieces I've ever studied, and is a perfect example of why metalheads and jazz musicians alike respect Bach.
Johann Sebastian Bach - Chromatic Fantasia and Fugue in d minor, BWV 903
Marco Mencoboni
https://youtu.be/7sroIJi_x6c
I've played it on piano many times, but never on a *real* harpsichord. Someday...