Good explaination from reddit: The stereotypical depiction of the mentally ill person believing to be Napoleon has a simple explanation: this was a common occurrence in GD patients in the 19th century. Like today, GD sufferers believed to be celebrities, but only celebrities with an extraordinary, idealized symbolic value that overrides the actual person. Napoléon, Joan of Arc or Jesus Christ fitted that profile, but not the bourgeois King Louis-Philippe: in her study of the phenomenon, historian Laure Murat had not found a single patient in the French asylum archives who claimed to be him (Murat, 2014)…
Dr. Squatch Woodland Pine : )