Image from the "My Little Pony Magical Gallery":https://apps.apple.com/gb/app/my-little-pony-magical-gallery/id1586149043 app, resized to the original aspect ratio of the painting.

Original description:

Congratulations! You’ve discovered a picture from the Magical Gallery and this one features our star herself, the courageous Sunny Starscout. Sunny believes that earth ponies, unicorns and pegasi were once friends and can be again, bringing friendship and magic back to Equestria, and I believe that too! Take a look at that fabulous figure of a horse in the painting on the wall. Dating back from around 1762, this is a George Stubbs painting of the famous racehorse Whistlejacket. Like Sunny Starscout, Whistlejacket is dynamic, beautiful and really popular. In fact, this is one of the most famous paintings of a horse ever. But when it was first painted, it caused a sensation. People thought it was unfinished, because it’s just Whistlejacket, and nothing else. What would you paint in the background? Who would you paint with Whistlejacket?