Christian VII of Denmark (1749–1808) was insane throughout his long reign. The royal physician, Johann Friedrich Struensée (1737–72), usurped his power. In 1771 the King appointed him Privy Cabinet Minister. Struensée revolutionized the whole administration of the Danish-Norwegian kingdom and had an adulterous relationship with the Queen, Caroline Mathilda, George III’s sister. In January 1772 he was arrested, sentenced to death for lese-majesty and executed. During his confinement, he wrote a memoir on the King’s condition, which he considered to be caused by, or the effect of, masturbation. In 1906 Christiansen interpreted it as a case of dementia praecox, i.e. schizophrenia. It is now suggested that Christian’s insanity, like that of George III (his cousin), might have been due to porphyria – the ‘royal malady’, possibly inherited through his mother, Princess Louise of England or his father, King Frederik V, who died from an illness which retrospectively resembles a case of porphyria.
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