An aurelius bearing the image of Diadumenian
Emperor of the Roman Empire
Caesar May 217 – May 218
Co-emperor Macrinus
Reign May 218 – June 218
Predecessor Macrinus
Successor Elagabalus
Born 14 September 208 AD
Died 218 AD
Full name
Marcus Opellius Antoninus Diadumenianus
Regnal name
Imperator Caesar Marcus Opellius Antoninus Diadumenianus Augustus
Father Macrinus
Mother Nonia Celsa

Diadumenian (/dˈædʊˌmniən/; Latin: Marcus Opellius Antoninus Diadumenianus Augustus) (September 14/19, 208 – 218), was briefly Roman Emperor, in 218. He was born to Macrinus, the future emperor, and Nonia Celsa, whose name may be fictitious, on 14 September 208. He was elevated to Caesar in May 217, and after Elagabalus revolted a few days later Diadumenian was elevated to co-emperor. After Macrinus was defeated in the Battle of Antioch, on 8 June 218, Diadumenian was sent to the court of Artabanus V to ensure his safety; however he was captured and executed along the way, in late June.


Diadumenian was born on 14 September 208, named Marcus Opellius Diadumenianus, to Macrinus, the Praetorian Prefect and future emperor, and his possibly fictitious wife Nonia Celsa.[1] Macrinus declared himself emperor on 11 April 217, three days after Emperor Caracalla was assassinated. Shortly after, Diadumenian was elevated to caesar at Zeugma, while his guard was escorting him from Antioch to Mesopotamia, to join his father. He was also given the name Antoninus, in honor of the Antonine dynasty, at this time.[2] On 16 May 218 a revolt against him was launched in Emesa by Elagabalus, a relative of Caracalla through his mother, Julia Soaemias, who was Caracalla's cousin. In order to put down the revolt, Macrinus led his legions to the praetorian fort at Apamea. There Macrinus elevated Diadumenian to augustus, making him co-emperor. After Macrinus was defeated by Elagabalus on 8 June 218, at the Battle of Antioch, Macrinus fled north to the Bosporus. Before fleeing he entrusted Diadumenian to loyal servants, instructing them to take him into the Parthian Empire, to the court of Artabanus V, to ensure his safety. Diadumenian was captured en route in Zeugma, and executed in late June.[3][4] His head was brought to Elagabalus, and reportedly kept as a trophy.[5]


While caesar, a large number of coins were struck for Diadumenian, although less than the amount struck for his father. Coins in which he is depicted as augustus are extremely limited, and the only known coins from this time are denarii. This has led to the suggestion, first proposed by Ancient Numismatist Curtis Clay, that a large issue of coins was being made for Diadumenian, however they were quickly melted down when the news of Macrinus' defeat spread. Notably, some eastern provincial coins from the period exist which give Diadumenian the title sebastos, at the time the Greek equivalent of the Roman augustus.[3] In terms of gold coins, Diadumenian has one known style of aureus, bearing his image on the obverse, and displaying Spes standing on the reverse, and one known style of half-aureus, bearing his image on the obverse, and displaying himself holding a sceptre and standard.[6]




  • Bédoyère, Guy de la (2017). Praetorian: The Rise and Fall of Rome's Imperial Bodyguard. Yale University Press. ISBN 9780300226270. 
  • Bunson, Matthew (1991). Encyclopedia of the Roman Empire. Facts On File. ISBN 9781438110271. 
  • Friedberg, Arthur L.; Friedberg, Ira S.; Friedberg, Robert (2017). Gold Coins of the World - 9th edition: From Ancient Times to the Present. An Illustrated Standard Catlaog with Valuations. Coin & Currency Institute. ISBN 9780871840097. 
  • Vagi, David L. (2000). Coinage and History of the Roman Empire, c. 82 B.C.- A.D. 480. Fitzroy Dearborn. ISBN 9781579583163. 
Regnal titles
Preceded by
Roman Emperor
Served alongside: Macrinus
Succeeded by
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.