Valerian (Latin: Publius Licinius Valerianus Augustus; 193/195/200 – 260 or 264), also known as Valerian the Elder, was Roman
Emperor from 253 to 260. He was taken captive by Persian king Shapur I after the Battle of Edessa, becoming the only Roman
Emperor who was captured as a prisoner of war, causing instability in the Empire. (en)