Praetorian prefect

High office in the Roman Empire Part of a series on theMilitary of ancient Rome 753 BC – AD 476 Structural history Army Unit types and ranks Decorations and punishments Legions Auxilia Generals Navy Fleets Admirals Campaign history Regal Period Mid-Republic Wars and battles Technological history Military engineering Castra Siege engines Triumphal arches Roads Political history Strategy and tactics Infantry tactics Frontiers and fortifications Limes Walls Limes Britannicus Antonine Wall Hadrian's Wall Saxon Shore Limes Germanicus Alb Limes Lauter Valley Limes Lower Germanic Limes Main Limes Neckar-Odenwald Limes Upper Germanic-Rhaetian Limes Wetterau Limes Danube–Iller–Rhine Limes Norican Limes Claustra Alpium Iuliarum Pannonian Limes Limes Alutanus Limes Moesiae Trajan's Wall Anastasian Wall Limes Sarmatiae Limes Arabicus Limes Tripolitanus Limes Mauretaniae Ancient Rome portalvte The praetorian prefect (Latin: praefectus praetorio; Greek: ἔπαρχος/ὕπαρχος τῶν πραιτωρίων) 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 legal