The “glass delusion” is a psychiatric disorder, recorded in the late…

The “glass delusion” is a psychiatric disorder, recorded in the late Middle Ages in which the sufferers believed themselves to be made out of glass and likely to shatter into pieces. One famous early sufferer was King Charles VI of France who refused to allow others to touch him and wore protective clothing to prevent himself from “shattering”. To maintain a perfectly serene environment he required all the windows in his palace to remain shut and that anyone who approached him to do so on tip-toe.