INSANITY DOES NOT DISTINGUISH!

EMPEROR JUSTIN II

The Byzantine emperor Justin II, who ruled in the sixth century, got a nervous breakdown and was insane for nine years, with periods of lucidity.
His attendants who sometimes had to tie the emperor, to prevent him from throwing himself out of the window or biting them, watched him. To calm the emperor and stop him from making foolish things, the attendants drew him in a little wagon with a throne upon it. An organ, which played almost day and night, also had a quieting effect.

CALIPH AL-HAKIM

The Egyptian caliph al-Hakim who reigned in the eleventh century was famous for his eccentricity and was possibly insane too.
He was a person full of contradictions, and his politics was characterized by liberalism as well as cruelty. Al-Hakim was a clean-living man who banned intoxicants, musical instruments and various kinds of amusements, among other things. By night al-Hakim went on long walking-tours. It is rumoured that he then sometimes got absolutely mad, and that he even murdered a person. Al-Hakim may have served as a model for the nocturnal wanderer in Baghdad whom we read about in Arabian Nights.

SOURCE - INTERNET