Final answer:
Disney's Magic Kingdom castle was inspired by Neuschwanstein Castle in Bavaria, built by King Ludwig II.
Step-by-step explanation:
Disney's iconic Magic Kingdom castle was inspired by Neuschwanstein Castle, which is located in the European region of Bavaria. This castle was commissioned by King Ludwig II of Bavaria in the 19th century. Often known as "Mad King Ludwig", his opulent and fantastical designs are seen as the epitome of Romantic architecture and served as the perfect inspiration for Disney's fairy tale castles that are recognized around the world.