Image imported from derpibooru 
Original Description:
 
A commissioned piece by Optimistic Neighsayer, of their My Little Pony original character, Guiding Light, playing a pipe organ. I have definitely never drawn a pipe organ, but I tried my best. I decided to try and go with stained glass window panels inside of a darkened castle setting, since this character’s cutie mark seems to be a prism. The piece as a whole is inspired by Beethoven’s “Moonlight Sonata” piece, given that a pipe organ is similar to a piano, and given the song title, I decided to go with Princess Luna etched in the stain glass windows. This was definitely a bit of a challenging piece of art for me, but well worth the effort.
 
Commission info:  
https://www.deviantart.com/manaminori/journal/Commission-Info-871015519