In 1828, a teenage boy stumbles into a Nuremberg square clutching mysterious letters and claiming he spent his entire life in a pitch-black dungeon. This deep dive reconstructs the true story of Kaspar Hauser, Europe's most famous foundling.

We weigh his impossible dungeon tale against the physical and medical evidence, follow his staged attacks and escalating deceptions, and see how modern DNA analysis and a vaccination scar finally dismantled a two-century-old legend.

• Why his healthy body contradicted years of claimed isolation
• The Romantic-era "noble savage" appetite that made people believe him
• His self-inflicted wounds staged to revive fading fame
• The mirror-writing note that exposed his own forgery
• 2024 DNA and a cowpox scar disproving the lost-prince theory