Balbinus - Augustus of Imperium Romanum from 22 April 238 to 29 July 238
Decimus Caelius Calvinus Balbinus Pius Augustus was Roman Emperor with Pupienus for three months in 238, the Year of the Six Emperors.

Not much is known about Balbinus before his elevation to emperor. When the Gordians were proclaimed Emperors in Africa, the Senate appointed a committee of twenty men, including Balbinus, to co-ordinate operations against Maximinus Thrax. On the news of the Gordians' defeat, the Senate voted Pupienus and Balbinus as co-emperors on 22 April 238, though they were soon forced to co-opt the child Gordian III as a colleague.

Balbinus and Pupienus didn't work well together, and they were soon living in different parts of the Imperial palace, where they were later assassinated by disaffected elements of the Praetorian Guard, with Balbinus' death occurring on 29 July 238.
Emperor Balbinus of the Roman Empire

(1) Balbinus AD 238
Obverse: IMP CAES D CAEL BALBINVS AVG, radiate, draped and cuirassed bust right
Reverse: PIETAS MVTVA AVGG, clasped hands
Ref: RIC 12; RSC 17
(2) Balbinus 238 AD
Obverse: IMP C D CAEL BALBINVS AVG, Bust of Balbinus facing right, wearing laurel wreath, cuirass, and drapery
Reverse: PROVIDENTIA DEORVM, Providentia standing facing, head left, holding wand over globe and cornucopia
Ref: RIC IV Balbinus 7