Theophylact Simocatta
After 572, Justin was reported to have fits of insanity. John of Ephesus, whose Monophysite sect suffered persecutions under Justin, offered a vivid description of Justin's madness, in which he behaved like a wild animal, was wheeled about on a mobile throne and required organ music to be played day and night. In 574, at Sophia's suggestion, he adopted the general Tiberius as his son and heir, and then retired in his favor. On 7 December, according to Theophylact Simocatta, Justin remained sufficiently clear-minded to make an eloquent speech as he passed the crown: