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.
Comes
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Comes, translated as count, was a Roman title, generally linked to a comitatus or comital office.
Constantine I SOLI INVICTO COMITI (Comes to Sol Invictus)
13th-century inscription in Trento Cathedral, reading Iacobus comes, "Count James"