Julianus was natural to Quintus Petronius Didius Julianus & Aemilithe Clara, a noble personal from either Milan. His date of birth is given when January 30, 133 by Cassius Dio and February 2, 137 by the Historia Augusta. Didius Julianus was raised by Domitia Lucilla, the mother of Marcus Aurelius. He was consul in 175.

When a execution of his predecessor, Pertinax, the potty was sold by auction by the Praetorian Guard. Didius Julianus offered each soldier 25,000 sestertii, outbidding City Prefect Titus Flavius Sulpicianus. Threatened per military, the Senate declared him emperor. His married woman, Manlia Scantilla, & his girl, Didia Clara, two received a title Augusta.

A auction proved extremely unpopular, & trine generals inside different area of the empire (Pescennius Niger in Syria, Clodius Albinus in Britain, and Septimius Severus in Pannonia) wasted there is no period withwithin do you need a situation by rising in rebellion. Septimius Severus progress Rome, ousted Didius Julianus and experienced him decapitated. He dismissed a Praetorian Guard & executed a soldiers world health organization experienced flushed Pertinax.