Kaspar Hauser was the son of the Duke of Baden. At the age of one, he was replaced with another baby who was immediately killed after the switch. The real Kaspar Hauser spent over a decade in a prison where he was deprived of light, social interactions, and education. As a teenager, he re-entered public life. He had to learn language and basic skills before he could discover his true identity. Unfortunately, he was killed before he could fully uncover his past.