Lucius Aelius Sejanus ( – 18 October AD 31), commonly known as Sejanus (), was a Roman Empire soldier and confidant of the Roman Emperor Tiberius. Of the Equites class by birth, Sejanus rose to power as prefect of the Praetorian Guard, the imperial bodyguard, of which he was commander from AD 14 until his execution for treason in AD 31.
While the Praetorian Guard was formally established under Emperor Augustus, Sejanus introduced a number of reforms which saw the unit evolve beyond a mere bodyguard into a powerful and influential branch of the government involved in public security, civil administration and ultimately political intercession; these changes had a lasting impact on the course of the Principate.
During the 20s, Sejanus gradually accumulated power by consolidating his influence over Tiberius and eliminating potential political opponents, including the emperor's son Drusus Julius Caesar. When Tiberius withdrew to Capri in AD 26, Sejanus was left in control of the administration of the empire. For a time the most influential and feared citizen of Rome, Sejanus suddenly fell from power in AD 31, the year his career culminated with the Roman consul. Amidst suspicions of conspiracy against Tiberius, Sejanus was arrested and executed, along with his followers.
Strabo married into equally illustrious families. One of his wives was Cosconia Gallita, sister of Servius Cornelius Lentulus Maluginensis (suffect consul in AD 10) and Publius Cornelius Lentulus Scipio (suffect consul in AD 2). Sejanus was once thought to have possibly been a child of this marriage, but Ronald Syme has argued that Sejanus's mother was a Junia Blaesa, sister of Junius Blaesus.
Sejanus's brother Lucius Seius Tubero, who became Consul suffectus in AD 18, was thought to have been a paternal half-brother, from his father Strabo marrying a daughter of Quintus Aelius Tubero but Syme has rejected this, instead he believes that Lucius Seius Tubero was Junia Blaesa's son from a marriage to Quintus Aelius Tubero whom Strabo adopted upon marrying Junia.
Sejanus was later adopted into the Aelia gens, possibly by Gaius Aelius Gallus the prefect, or Sextus Aelius Catus his sibling, and by Roman custom became known as Lucius Aelius Seianus or simply as Seianus.
The adoptive family of Sejanus counted two consuls among their ranks: Quintus Aelius Tubero (consul in 11 BC) and Sextus Aelius Catus (consul in AD 4), who was the father of Aelia Paetina, the second wife of the future Emperor Claudius. Sejanus's uncle, Junius Blaesus, distinguished himself as a military commander; he became proconsul of Africa Province in AD 21 and earned Roman triumph by crushing the rebellion of Tacfarinas.Tacitus, Annals ,
According to the ancient historian Tacitus, Sejanus was also a former favourite of the wealthy Marcus Gavius Apicius, whose daughter may have been Sejanus's first wife Apicata. With Apicata, Sejanus had two sons, Strabo and Capito Aelianus, and a daughter, Junilla.Tacitus, Annals
The Praetorian Guard was an elite unit of the Roman army formed by Augustus in 27 BC, with the specific function to serve as a bodyguard to the emperor and members of the imperial family.Bingham, p. 30. Much more than a guard however, the Praetorians also managed the day-to-day care of the city, such as general security and civil administration.Bingham, p. 238. Furthermore, their presence served as a constant reminder to the people and the Senate of the substantial armed force which served as the basis for the imperial power.Bingham, p. 232. Augustus was careful however to uphold the Roman Republic veneer of this regime, and only allowed nine cohorts to be formed (one fewer than in a normal Roman legion), which were inconspicuously scattered across various lodging houses in the city, and commanded by two prefects.Bingham, pp. 231, 40.
When Strabo was assigned to the Roman governor of Egypt in AD 15, Sejanus became the sole commander of the Praetorians and instigated reforms that helped shape the guard into a powerful tool of the principate.Cassius Dio, Roman History LVII.19Bingham, p. 43. In AD 20 the scattered encampments inside the city were centralized into Castra Praetoria just outside RomeTacitus, Annals Syme believes Tacitus delayed mention of these reforms until the year 23 for stylistic reasons. The actual date the Castra Praetoria was founded may have been AD 20. See and the number of cohorts was increased from nine to twelve,Bingham, p. 50. one of which now held the daily guard at the palace. The practice of joint leadership between two prefects was abandoned, and Sejanus himself appointed the and Tribunus Militum. With these changes in effect, Sejanus now commanded the complete loyalty of a force of around 12,000 soldiers, all of which were at his immediate disposal. The facade of Augustus was no longer maintained, and Tiberius openly displayed the strength of the guard at parades.Cassius Dio, Roman History LVII.22
The history of Sejanus and Drusus dated back to at least AD 15. That year a mutiny had broken out among Roman legion posted in Pannonia and Germania. While his adopted son Germanicus restored order in Germania, Tiberius's biological son Drusus was sent to quell the uprising in Pannonia, accompanied by Sejanus and two Praetorian cohorts.Tacitus, Annals In part due to what the soldiers believed to be bad , Drusus quickly managed to restore stability in the army and publicly put the chief instigators to death. The camp was purged of mutineers by the Praetorians and the legions returned to the winter barracks.Tacitus, Annals , Despite this success, the following years witnessed a growing animosity between Drusus and Sejanus.
Since the death of Germanicus, Drusus had been groomed as the successor of his father, commanding legions in Illyricum in AD 18,Tacitus, Annals , and sharing the consulship with Tiberius in AD 21.Tacitus, Annals In practice it was still Sejanus who was the second man in the empire, and he was ambitious to further expand his power. As early as AD 20, Sejanus had sought to solidify his connection with the imperial family by betrothing his daughter Junilla to the son of Claudius, Claudius Drusus.Tacitus, Annals At the time the girl was only 4 years old but the marriage never happened, as the boy mysteriously or accidentally died a few days later of .Suetonius, The Lives of Twelve Caesars, Life of Claudius 27
When this failed, it seems Sejanus turned his attention toward eliminating Drusus. By AD 23 the enmity between the two men had reached a critical point. During an argument Drusus had struck the prefect with his fist, and he openly lamented that "a stranger was invited to assist in the government while the emperor's son was alive".Tacitus, Annals Tiberius was already in his sixties, thus the possibility of Drusus succeeding his father in the near future loomed large. To secure his position, Sejanus secretly plotted against Drusus and seduced his wife Livilla. With her as an accomplice, Drusus was slowly poisoned and died of seemingly natural causes on September 13, AD 23.Tacitus, Annals
Germanicus had died in AD 19, in somewhat suspicious circumstances in Roman Syria.Tacitus, Annals Following his death, his wife Agrippina the Elder returned to Rome with their six children and became increasingly involved with a group of senators who opposed the growing power of Sejanus. Her relations with Tiberius became increasingly fraught, as she made it clear that she believed that he was responsible for the death of Germanicus.Tacitus, Annals , , The climate was further poisoned by the hatred that Tiberius's mother Livia Drusilla (the widow of Augustus) felt for her, since Agrippina's ambition, to be the mother of emperors and thus Rome's first woman, was an open secret.Tacitus, Annals Sejanus saw Agrippina's sons Nero, Drusus, and Caligula as a threat to his power.
Sejanus again attempted to marry into the Julio-Claudian family. Having divorced Apicata two years earlier, in AD 25 he asked to marry Drusus' widow Livilla, possibly with an eye towards placing himself, as an adopted Julian, in the position of a potential successor.Tacitus, Annals The emperor denied this request, warning Sejanus that he was in danger of overstepping his rank.Tacitus, Annals Alarmed by this sudden denigration, Sejanus changed his plans and began to isolate Tiberius from Rome. By fueling his paranoia towards Agrippina and the Senate, he induced the emperor to withdraw to the countryside of Campania, which he did in AD 26, and finally to the island of Capri, where he lived until his death in AD 37.Tacitus, Annals , Sejanus easily controlled all information that passed between Tiberius (guarded by the Praetorians) and the capital.Tacitus, Annals
Despite the withdrawal of Tiberius from Rome's political scene, the presence of Livia seems to have checked Sejanus's overt power for a time. According to Tacitus, her death in AD 29 changed all that.Tacitus, Annals Sejanus began a series of purge trials of Roman Senator and wealthy equestrians in the city, removing those capable of opposing his power as well as extending the imperial (and his own) treasury. Networks of spies and informers brought the victims to trial with false accusations of treason, and many chose suicide over the disgrace of being condemned and executed.Cassius Dio, Roman History LVIII.4 Among those who perished were Gaius Asinius Gallus, a prominent senator and opponent of Tiberius who was linked to Agrippina's faction.Cassius Dio, Roman History LVIII.3 Agrippina and her sons Nero and Drusus were arrested and exiled in AD 30, and later starved to death in suspicious circumstances.Tacitus, Annals, – Only Caligula, the youngest son of Germanicus and Agrippina, survived the purges of Sejanus by moving to Capri with Tiberius in AD 31. His three younger sisters, Agrippina the Younger, Julia Drusilla, and Julia Livilla, also all survived the purges of Sejanus.Tacitus, Annals
Through years of crafty intrigues and indispensable service to the emperor, Sejanus had worked himself up to become the most powerful man in the Empire.
But suddenly, at the end of AD 31, he was arrested, summarily executed and his body unceremoniously cast down the Gemonian stairs. What caused his downfall is unclear:Bingham, p. 66. ancient historians disagree about the nature of his conspiracy, whether it was Tiberius or Sejanus who struck first and in which order subsequent events occurred. Modern historians consider it unlikely that Sejanus plotted to seize power and, if he had planned so at all, rather might have aimed at overthrowing Tiberius to serve as a regent to Tiberius Gemellus, son of Drusus, or possibly Caligula. Unfortunately the relevant section pertaining to this period in the Annals of Tacitus has been lost. According to Josephus, it was Antonia Minor, the mother of Livilla, who finally alerted Tiberius to the growing threat Sejanus posed (possibly with information provided by Satrius Secundus), in a letter she dispatched to Capri in the care of her freedman Pallas.Josephus, Antiquities of the Jews According to Juvenal, a letter was sent from Capri with orders to execute Sejanus without a trial.Juvenal, Satire X.67–72
Further details concerning Sejanus's fall are provided by Cassius Dio, writing nearly 200 years later in his Roman History. It appears that, when Tiberius heard to what extent Sejanus had already usurper his authority in Rome, he immediately took steps to remove him from power. However, he realised that an outright condemnation could provoke Sejanus to attempt a coup. Instead, Tiberius addressed a number of contradictory letters to the Senate, some of which praised Sejanus and his friends and some of which denounced them. Tiberius variously announced that he would arrive in Rome the next day or that he was at the point of death.Cassius Dio, Roman History LVIII.6 He stepped down as consul, forcing Sejanus to do the sameCassius Dio, Roman History LVIII.7 and conferred an honorary priesthood upon Caligula, rekindling popular support for the house of Germanicus.Cassius Dio, Roman History LVIII.8 The ensuing confusion was successful in alienating Sejanus from many of his followers. With the intentions of the emperor no longer clear, it was now deemed a safer course of action in Rome to withdraw from overtly supporting Sejanus until the matter was clearly resolved.
When it became obvious to Tiberius that support for Sejanus was not as strong as the emperor had feared, his next step was to choose Naevius Sutorius Macro, previously prefect of the vigiles (Roman police and fire department), to replace Sejanus and effect his downfall.Bingham, p. 63.Cassius Dio, Roman History LVIII.9 On October 18, AD 31, Sejanus was summoned to a Senate meeting by a letter from Tiberius, ostensibly to bestow the tribunician powers upon him. At dawn, he entered the Senate; while the letter was being read, Macro assumed control of the Praetorian Guard, and members of the vigiles, led by Publius Graecinius Laco, surrounded the building. The senators at first congratulated Sejanus, but when the letter, which initially digressed into completely unrelated matters, suddenly denounced him and ordered his arrest, he was immediately apprehended and imprisoned in the Tullianum.Cassius Dio, Roman History LVIII.10
Enraged upon learning the truth, Tiberius soon ordered more killings. Livilla committed suicide or was starved to death by her mother Antonia Minor. The remaining children of Sejanus, Capito Aelianus and Junilla, were executed in December of that year.Tacitus, Annals Because there was no precedent for the capital punishment of a virgin, Junilla was said to have been raped first, with the rope around her neck and her body thrown down the Gemonian stairs along with her brother's. At the beginning of the following year, damnatio memoriae was also passed on Livilla.Tacitus, Annals
Although Rome at first rejoiced at the demise of Sejanus, the city was quickly plunged into more extensive trials as Tiberius persecuted all those who could in any way be tied to the schemes of Sejanus or had courted his friendship.Tacitus, Annals The Senatorial ranks were purged; the hardest hit were those families with political ties to the Julians. Even the imperial magistracy was not exempted from Tiberius's wrath.Tacitus, Annals Arrests and executions were now supervised by Naevius Sutorius Macro, who succeeded Sejanus as the Prefect of the Praetorian Guard.Tacitus, Annals The political turmoil continued until the death of Tiberius in AD 37, after which he was succeeded by Caligula.
Most historical documentation of Tiberius's revenge is given by Suetonius and Tacitus; their portrayal of a tyrannical, vengeful emperor has been challenged by several modern historians. Edward Togo Salmon wrote that,
Among the writers who fell victim to the regime of Sejanus and its aftermath, were the historians Aulus Cremutius Cordus and Velleius Paterculus and the poet Phaedrus. Cordus was brought to trial in AD 25 by Sejanus, under accusations of treason. He was charged for having eulogized Marcus Junius Brutus and spoken of Gaius Cassius Longinus as the last of the true Romans, which was considered an offence under the Lex Maiestatis; the Senate ordered the burning of his writings.Tacitus, Annals Seneca the Younger, Essays, To Marcia On Consolation I.2–4 His fall is elaborated upon by Seneca the Younger, in his letter to Cordus' daughter Marcia To Marcia, On Consolation. Seneca tells us that her father most likely incurred Sejanus's displeasure for criticising him because he had commissioned a statue of himself. We also know from this source that Cordus starved himself to death. Marcia was instrumental in saving her father's work so that it could be published again under Caligula.
Phaedrus was suspected of having alluded to Sejanus in his Fables and received some unknown punishment short of death (Cf. Fables I.1, I.2.24, and I.17).Phaedrus, Fables Book III, preface Velleius Paterculus was an historian and contemporary of Sejanus, whose two-volume The Roman History details a history of Rome from the fall of Troy until the death of Livia Augusta in AD 29. In his work he praised Tiberius and Sejanus, even defending the latter's high position in the government, despite not ranking higher than equestrian.Velleius Paterculus, Roman History, II.127–128 II.127–128 It has been conjectured that he was put to death as a friend of Sejanus.Cruttwell, C. T. (1878) A History of Roman Literature. 2nd Ed. London: Charles Griffin & Co. p.345
Making contemporary political points in this way through reinterpretation of distant historical episodes was now common. In 17th century France, the fall of the powerful Cardinal Mazarin was celebrated in a political pamphlet that also drew parallels with the career of Sejanus, L'Ambitieux ou le portraict d'Aelius Sejanus en la personne du Cardinal Mazarin (Paris, 1642). In England other royal favourites were seen in these terms too. George Villiers, 1st Duke of Buckingham, is the target of an anonymous manuscript Roman tragedy, The Emperor's Favourite.Siobhan C. Keenan, “Staging Roman History, Stuart Politics, and the Duke of Buckingham: The Example of The Emperor’s Favourite Early Theatre 14.2 (2011) The prudent need for anonymity is suggested by the arrest of Sir John Eliot, who was sent to the Tower of London for his outspoken criticism of the Duke in the 1626 parliament, comparing him to Sejanus.John Forster, Lives of Eminent British Statesmen, London 1836, p.42ff
Following Buckingham's death in 1628, when it was safer to do so, a translation of a history by Pierre Matthieu was published under the title, The Powerful Favourite, the life of Aelius Sejanus. Volume 1, Google Books This was followed in 1634 by another translation, Sir Thomas Hawkins' Politicall Observations upon the Fall of Sejanus, which had originally been titled Della peripetia di fortuna (Of Changes of Fortune) by its author, Giovanni Battista Manzini. Google BooksSiobhan C. Keenan, "Staging Roman History, Stuart Politics, and the Duke of Buckingham: The Example of The Emperor’s Favourite", Early Theatre 14.2 (2011) Later in the century Anthony Ashley Cooper, 1st Earl of Shaftesbury, was the target of the four-page political pamphlet Sejanus, or The popular favourite, now in his solitude, and sufferings, signed with the pseudonym Timothy Tory (1681). Google Books The story of Sejanus, with reference to the Earl's imprisonment in the Tower on a charge of treason, is interpreted as an argument for absolute monarchy, direct rule without the intermediary of politicians.W. Thomas, Wilfrid Laurier University 2006, The Crafting of Absalom and Achitophel: Dryden’s Pen for a Party, pp.52–7
The name of Sejanus continued to be pressed into political service during the 18th century. Prime Minister Robert Walpole was attacked in 1735 in the course of a popular skit, C----- and country: A play of seven acts...the whole concluding with the grand masque, call'd, The downfall of Sejanus; its authorship is attributed to 'a masquerader' and in the printed version the masque precedes the play, although it is performed last. This gives the clue of how to take what is to follow and consists of a conversation between Punch and the Hangman, opening with the question 'Is this same Sejanus to go out of the World like a Man, or to die the Death of a mad Dog? For he has lived like a sad One, from the first Day that the Emperor Tiberius took him into Favour.' A subtler attack on a later prime minister occurred in 1769 when Jonson's Sejanus was reissued under the title of The Favourite. This was prefaced with a tongue-in-cheek dedication to Lord Bute, denying that there can be any comparison between the conduct of Sejanus and that of his lordship.
Elsewhere in Europe there were other dramatic adaptations of the story. They included Jean de Magnon's rhyming tragedy, Sejanus (1647) and Henri van der Zande's De dood van Elius Sejanus of Spiegel voor der vorsten gunstelingen (The death of Sejanus, a mirror for the favourites of princes, Amsterdam 1716). Later there was another recycling of Jonson's tragedy in England by the Irish actor Francis Gentleman. Abridged and 'improved' by some additions of his own, he published his Sejanus, a tragedy: as it was intended for the stage (1752), when he could not get it acted.See the preface, pp.v-xiii Later plays include a 5-act tragedy by A.Arterton (1875) and the privately printed Sejanus: A Tragedy in Five Acts by P. J. A. Chaulk (1923)
A later fictional treatment of the historical episode appeared as the first story of Edward Maturin's Sejanus, and Other Roman Tales (New York 1839). It also figures in Robert Graves' I, Claudius (1934). In this Antonia sends the letter of accusation to Tiberius via Claudius, after discovering her daughter is plotting with Sejanus. And since Pontius Pilate was a nominee of Sejanus and implicated in his anti-Jewish policies, it encouraged the inclusion of Sejanus in novels dealing with the circumstances of Jesus Christ's crucifixion.Gary DeLashmutt, "Sejanus and the Chronology of Christ's death", Xenos Christian Fellowship The first of these was Miles Gerald Keon's Dion and the Sibyls: A Classic Christian Novel (London, 1866);Later published by the Catholic Publication Society in New York in 1872: later examples include Paul L. Maier's Pontius Pilate (Grand Rapids MI 1968) and Chris Seepe's The Conspiracy to Assassinate Jesus Christ (Toronto 2012).
The aim of some later novels has been to concentrate as much on local colour as on the story. This was true of William Percival Crozier's historical romance The Fates Are Laughing (1945), which was written by a classicist with an eye for detail and set during the fall of Sejanus and the reign of Caligula. Full text at the University of Florida libraries It is equally true of some recent detective novels set in Roman times. David Wishart's Sejanus (London, 1998) features Marcus Corvinus, and James Mace's Empire Betrayed: The Fall of Sejanus (2013) focused on a military colleague, Aulus Nautius Cursor. Author's summary
Rise to power
Praetorian prefect
Feud with Drusus
Consolidation of power
Downfall
Denunciation
Sejanus was so great a person by reason both of his excessive haughtiness and of his vast power, that, to put it briefly, he himself seemed to be the emperor and Tiberius a kind of island potentate, inasmuch as the latter spent his time on the island of Capreae.Cassius Dio, Roman History LVIII.5
Execution and aftermath
Legacy
Praetorian Guard
Historiography
Literary interpretations
Sources
Further reading
External links
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