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Thepraetorian prefect (Latin:praefectus praetorio;Greek:ἔπαρχος/ὕπαρχος τῶν πραιτωρίων) was a high office in theRoman Empire established byEmperorAugustus in 2 BC. Originating as the commander of thePraetorian Guard, the office gradually acquired extensive legal and administrative functions, with its holders becoming the Emperor's chief aides. UnderConstantine I, the office was much reduced in power and transformed into a purely civilian administrative post, while under his successors, territorially definedpraetorian prefectures emerged as the highest-level administrative division of the Empire. The prefects again functioned as the chief ministers of the state, with many laws addressed to them by name. In this role, praetorian prefects continued to be appointed by theEastern Roman Empire (and theOstrogothic Kingdom) until the reign ofHeraclius in the 7th century AD, when wide-ranging reforms reduced their power and converted them to mere overseers of provincial administration. The last traces of the prefecture disappeared in theByzantine Empire by the 840s.
The termpraefectus praetorio was often abbreviated in inscriptions as "PR PR" or "PPO".[1][2]
Under the empire the praetorians or imperial guards were commanded by one, two, or even three praefects (praefecti praetorio), who were chosen by the emperor from among theequites and held office at his pleasure. From the time ofAlexander Severus the post was open to senators also, and if an equestrian was appointed he was at the same time raised to the senate. Down to the time of Constantine, who deprived the office of its military character, the prefecture of the guards was regularly held by tried soldiers, often by men who had fought their way up from the ranks. In course of time the command seems to have been enlarged so as to include all the troops in Italy except the corps commanded by the city praefect (cohortes urbanae).[3]
The special position of the praetorians made them a power in their own right in the Roman state, and theirprefect, thepraefectus praetorio, soon became one of the more powerful men in this society. The emperors tried to flatter and control the praetorians, but they staged manycoups d'état and contributed to a rapid rate of turnover in the imperial succession. The praetorians thus came to destabilize the Roman state, contrary to their purpose. The praetorian prefect became a major administrative figure in the later empire, when the post combined in one individual the duties of an imperial chief of staff with direct command over the guard also.Diocletian greatly reduced the power of these prefects as part of his sweeping reform of the empire's administrative and military structures.[citation needed]
In addition to his military functions, the praetorian prefect came to acquire jurisdiction over criminal affairs, which he exercised not as the delegate but as the representative of the emperor. By the time of Diocletian he had become a kind of grand-vizier as the emperor's vice-regent and 'prime minister.' Constantine removed active military command in 312. The prefect remained as chief quarter-master general responsible for the logistical supply of the army. The prefect was the chief financial officer whose office drew up the global imperial budget. His office drew up the state liturgical obligations laid on the richer inhabitants of the Empire. He ceased to be head of administration which had to be shared with the master of the offices attached to the palace. Constantine in 331 confirmed that from the sentence of the praetorian praefect there should be no appeal. A similar jurisdiction in civil cases was acquired by him not later than the time ofSeptimius Severus. Hence a knowledge of law became a qualification for the post, which underMarcus Aurelius andCommodus, but especially from the time of Severus, was held by the first jurists of the age, (e.g.Papinian,Ulpian,Paulus) and, underJustinianus,John the Cappadocian, while the military qualification fell more and more into the background.[3]
Thetetrarchy reform ofDiocletian (c. 296) multiplied the office: there was a praetorian prefect as chief of staff (military and administrative)—rather than commander of the guard—for each of the two Augusti, but not for the two Caesars. Each praetorian prefect oversaw one of the four quarters created by Diocletian, which became regionalpraetorian prefectures for the young sons of Constantine ca 330 A.D. From 395 there were two imperial courts, atRome (laterRavenna) andConstantinople, but the four prefectures remained as the highest level of administrative division, in charge of severaldioceses (groups ofRoman provinces), each of which was headed by aVicarius.
UnderConstantine I, the institution of themagister militum deprived the praetorian prefecture altogether of its military character but left it the highest civil office of the empire.[3]
With the fall of the western part of the Empire into the hands of warlords, these, in order to have support in their new domains, recognized the supremacy of the emperor of the eastern part, reuniting at leastde iure the Empire under him, the prefectures were maintained as a way of delimiting the newviceroyalties:
This recognition would be maintained until the rise ofJustinian I, who ended the Ostrogothic and Vandal domains, but continued to recognize the Franks (as they were both Catholics) and the Visigoths (due to the lack of strength to continue theRecuperatio Imperii, but managing to establish a pro-Byzantine king,Athanagild, and the conquest ofSpania).
The following is a list of all known prefects of the Praetorian Guard, from the establishment of the post in 2 BC by Augustus until the abolishment of the Guard in 314.[5] The list is presumed to be incomplete due to the lack of sources documenting the exact number of persons who held the post, what their names were and what the length of their tenure was. Likewise, the Praetorians were sometimes commanded by a single prefect, as was the case with for exampleSejanus orBurrus, but more often the emperor appointed two commanders, who shared joint leadership. Overlapping terms on the list indicate dual command.
| Prefect | Tenure | Emperor served |
|---|---|---|
| Publius Salvius Aper | 2 BC –?? | Augustus |
| Quintus Ostorius Scapula | 2 BC – ?? | Augustus |
| Publius Varius Ligur[6] | ?? | Augustus |
| Lucius Seius Strabo | ??–15 | Augustus,Tiberius |
| Lucius Aelius Sejanus | 14–31 | Tiberius |
| Quintus Naevius Sutorius Macro | 31–38 | Tiberius,Caligula |
| Marcus Arrecinus Clemens | 38–41 | Caligula |
| Lucius Arruntius Stella[7] | 38–41 | Caligula |
| Rufrius Pollio | 41–44 | Claudius |
| Catonius Justus | 41–43 | Claudius |
| Rufrius Crispinus | 43–51 | Claudius |
| Lucius Lusius Geta | 44–51 | Claudius |
| Sextus Afranius Burrus | 51–62 | Claudius,Nero |
| Lucius Faenius Rufus | 62–65 | Nero |
| Gaius Ofonius Tigellinus | 62–68 | Nero |
| Gaius Nymphidius Sabinus | 65–68 | Nero |
| Prefect | Tenure | Emperor served |
|---|---|---|
| Cornelius Laco | 68–69 | Galba |
| Plotius Firmus | 69 | Otho |
| Licinius Proculus | 69 | Otho |
| Publius Sabinus | 69 | Vitellius |
| Alfenius Varus | 69 | Vitellius |
| Junius Priscus | 69 | Vitellius |
| Prefect | Tenure | Emperor served |
|---|---|---|
| Arrius Varus | 69–70 | Vespasian |
| Marcus Arrecinus Clemens[8] | 70–71 | Vespasian |
| Tiberius Julius Alexander[9] (?) | 69–?? | Vespasian |
| Titus Flavius Vespasianus[10] | 71–79 | Vespasian |
| Lucius Julius Ursus[11] | 81–83 | Domitian |
| Cornelius Fuscus | 81–87 | Domitian |
| Lucius Laberius Maximus[11] | 83–84 | Domitian |
| Casperius Aelianus | 84–94 | Domitian |
| Titus Flavius Norbanus | 94–96 | Domitian |
| Titus Petronius Secundus | 94–97 | Domitian |
| Prefect | Tenure | Emperor served |
|---|---|---|
| Afranius Hannibalianus | 286/292 | Diocletian |
| Asclepiades | 303 | (at Antioch) |
| Pomponius Januarianus | 285/286 | Maxentius |
| Julius Asclepiodotus | 290–296 | Diocletian;Constantius Chlorus |
| Constantius Chlorus | ?? – ?? | Diocletian |
| Manlius Rusticianus | 306–310 | Maxentius |
| Gaius Ceionius Rufius Volusianus | 309–310 | Maxentius |
| Ruricius Pompeianus | 3??–312 | Maxentius |
| Tatius Andronicus | 310 | Galerius |
| Pompeius Probus | 310–314 | Licinius |
| Petronius Annianus | 315–317 | Constantine I |
| Julius Julianus | 315–324 | Licinius |
| Junius Annius Bassus | 318–331 | Constantine I |
For praetorian prefects after the reformation of the office by emperorConstantine I, see:
A further prefecture was established by emperorJustinian I in the 6th century:
One or more of the preceding sentences incorporates text from a publication now in thepublic domain: Chisholm, Hugh, ed. (1911). "Praefect".Encyclopædia Britannica. Vol. 22 (11th ed.). Cambridge University Press. pp. 241–242.