King Carl Vi, Ruled by France for 40 years, died in 1422. But the king is not very famous for his long rule, and with his attacks of madness, because of which he was called Karl insane. Half of the year, the king of France lived ordinary life, signing decrees, convening advice and leading war. Other half of half from spent separately from all people in Paris, struggling with the attacks of long madness, during which he behaved as a child, then as a deep old man, then invented all sorts of unprecedented or not at all recognized himself as a king and rushed with a sword on his servants . And Karl Vi was confident that all his body is actually done from glass, and at any moment it can break away from any careless movement. Because of this, Karl Vi forbade people to touch himself, and ordered to make several armor sets, which almost never removed.
The state when a person is confident that his body is made of glass - not the fiction at all, but an actually existing psychological disease, which is called "Glass Delusion", which can be translated as "glass delusion". This type of mental disorder was particularly often met during the late Middle Ages, but some people suffered from him in 18-19th (as, for example, Princess Bavarian Alexander Amalia, who was convinced that her body was made of glass), and even modern doctors Fixed several patients who appealed for help because they were afraid to break their body.
This is interesting: Some testimonies from the biography of PI Tchaikovsky say that the famous Russian composer may also also suffer from "glass misconception."
Unfortunately, this disease has not yet been thoroughly studied, and most of the descriptions of the mental disorder have fallen from the Middle Ages and do not always contain complete information about the course of the disease. Most of the sicks represented their body as a glass vessel, but, in addition to all, all "glass people" from the late Middle Ages combines one detail: they belonged to the highest class. It is possible to conclude that the reason for the occurrence of the invention was the invention of the transparent glass, which began to make it possible at the time of late Middle Ages. And only rich people could afford similar glass products. For a modern person, transparent materials do not represent anything unusual, but for a person who lives 5 centuries ago, the transparent glass was akin to magic. Perhaps a long-term admissance by a glass vessel and the locality to faith in the supernatural could play with a reason for a sore joke, which was the cause of the disease.