I remixed the Hogwarts Castle model from @Usefulprints to work as a window box for my Hogwarts Express book nook. I scaled down and sliced the castle to fix inside a shell which mimics the night sky. I used fairy lights to light up the window box.
Hogwarts Express Book Nook: https://makerworld.com/en/models/400163#profileId-301662
Original Hogwarts model: https://makerworld.com/en/models/237997?from=search#profileId-262301