Praetorian prefect
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The praetorian prefect was a high office in the Roman Empire established by Emperor Augustus in 2 BC. Originating as the commander of the Praetorian Guard, the office gradually acquired extensive lega
The insignia of the praetorian prefect of Illyricum, as depicted in the Notitia Dignitatum: the ivory inkwell and pen case (theca), the codicil of appointment to the office on a blue cloth-covered table, and the state carriage.
Roman diocese
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In the Late Roman Empire, usually dated AD 284 to 641, the regional governance district known as the Roman or civil diocese was made up of a grouping of provinces each headed by a vicarius, the vicars
Emperor Constantine.
