Spanish Romance is a popular piece for classical/fingerstyle guitarists, and for good reason. It’s a beautiful melody. I have no idea who wrote this piece. Doing a little research online it seems that there are several people who have claimed to have written the song but it seems as if there is nothing definitive.
For this version, I change the bass line a bit in the E minor section. For the final repeat of the E minor section I had a note in two spots to add a little spice. 95% of this arrangement has not different compared to the way that most people play it.