The origins of the Fairy King in old Celtic lore. Stories of fairies are prominent in Irish folklore, and the belief in a fairy hierarchy, or fairy royalty, has been a popular notion for centuries.

Incidentally, the extraordinary building of the "fairy tale king" Ludwig II also inspired Walt Disney: The famous logo of the production company is based on the silhouette of Neuschwanstein.

Early cel-animated commercial made by George Pal about an unwell King who is brought back to health with the help of Van den Bergh's Sana Margarine.

Sure, the ball was a celebration of the king’s eventual victory, and at midnight, she lost her glass slipper and fled. However, the fairy tale is not the most essential part of her story.