The Palace and Park by Phillips, Forbes, Latham, Owen, Scharf, and Shenton

253-268. [Born A.D. 218. Died before Milan, A.D. 268. Aged 50.] Son of Valerian. When associated with his father in the empire, he commanded with success against the barbarians on the Rhine and Danube. In 260, Valerian was made captive by the Persians, and during the eight years of his imprisonment, his son made no effort to release him. Rome, whilst Gallienus reigned, was a prey to pestilence, internal rebellion, and the ravages of foreign nations. In A.D. 268, he laid siege to Milan, whither Aureolus, an invader of his empire, had fled for refuge. During the siege Gallienus fell--it is said by the hands of his own soldiers. His character was very bad. He was cruel, treacherous, and indolent, apathetic to public disaster, self-indulgent, frivolous, and a glutton. [From the marble in the Capitoline Museum at Rome.]