Macrinus child Diadumenian
Background and career
Macrinus was born in Caesarea (modern Cherchell, Algeria) in the Roman province of Mauretania Caesariensis to an equestrian family of Berber origins. According to David Potter, his family traced its origins to the Berber tribes of the region and his pierced ear was an indication of his Berber heritage. He received an education which allowed him to ascend to the Roman political class. Over the years, he earned a reputation as a skilled lawyer; and, under Emperor Septimius Severus, he became an important bureaucrat. Severus' successor Caracalla later appointed him a prefect of the Praetorian Guard.While Macrinus probably enjoyed the trust of Emperor Caracalla, this may have changed when, according to tradition, it was prophesied that he would depose and succeed the emperor. Macrinus, fearing for his safety, resolved to have Caracalla murdered before he was condemned.In the spring of 217, Caracalla was in the eastern provinces preparing a campaign against the Parthian Empire. Macrinus was among his staff, as were other members of the Praetorian Guard. In April, Caracalla went to visit a temple of Luna near the site of the battle of Carrhae and was accompanied only by his personal guard, which included Macrinus. On 8 April, while travelling to the temple, Caracalla was stabbed to death by Justin Martialis, a soldier whom Macrinus had recruited to commit the murder. In the aftermath, Martialis was killed by one of Caracalla's men.For two or three days, Rome remained without an emperor. On 11 April, Macrinus proclaimed himself emperor and assumed all of the imperial titles and powers, without waiting for the Senate. The army backed his claim as emperor and the Senate, so far away, was powerless to intervene. Macrinus never returned to Rome as emperor and remained based in Antioch for the duration of his reign. Macrinus was the first emperor to hail from the equestrian class, rather than the senatorial and also the first emperor of Mauretanian descent. He adopted the name of Severus, in honour of the Severan dynasty, and conferred the imperial title of Augusta to his wife Nonia Celsa and the title of Caesar and name of Antoninus to his son Diadumenianus in honour of the Antonine dynasty, thus making him second in command. At the time of Diadumenian's accession he was eight years old.
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