Префектура

latin: praefectura praetorio

greek: ἐπαρχότης τῶν πραιτωρίων or ὑπαρχία τῶν πραιτωρίων

modern: 

Prefercture (praetorian prefercture) originated in the reigne of Constantien I and his administrative reforms. Survived until the 7th centurary (reigne of emperor Iraclius).

Praetorian Prefecture of the Orient

Praetorian Prefecture of Illyricum

Praetorian Prefecture of Gaul

Praetorian Prefecture of Italy