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Lucius Aelius Seianus (20 BC – October 18, AD 31), commonly known as Sejanus (English pronunciation: ), was an ambitious soldier, friend and confidant of the Roman Emperor Tiberius. An equestrian by birth, Sejanus rose to power as prefect of the Roman imperial bodyguard, known as the Praetorian Guard, of which he was commander from AD 14 until his death 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; changes which would have 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 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 31, the year his career culminated with the consulship. Amidst suspicions of conspiracy against Tiberius, Sejanus was arrested and executed, along with his followers. == Family == Sejanus was born in 20 BC at Volsinii, Etruria, into the family of Lucius Seius Strabo.〔Tacitus, ''Annals'' IV.1〕 The Seii were Romans of the equestrian class (or knights), the lower of the two upper social classes of the Roman Republic and the early Roman Empire. Sejanus' grandfather maintained relations with senatorial families through his marriage with Terentia, a sister of the wife of Gaius Maecenas, who was one of Emperor Augustus' most powerful political allies.〔Adams, 76〕 Strabo married into equally illustrious families. He may have married a daughter of Quintus Aelius Tubero, allying himself with the more prestigious Aelian gens.〔 Lucius Seius Tubero, who became suffect consul in 18, was probably his son.〔 Strabo's last wife was Cosconia Gallita, sister of Servius Cornelius Lentulus Maluginensis (suffect consul in 10) and Publius Cornelius Lentulus Scipio (suffect consul in 2) and perhaps half-sister of Quintus Junius Blaesus (suffect consul in 10).〔 Sejanus could have been a child of this marriage. He was later adopted into the Aelian gens by Gaius Aelius Gallus, and by Roman custom became known as Lucius Aelius Seianus or simply as Sejanus.〔 http://www.jstor.org/discover/10.2307/291707?uid=3737536&uid=2129&uid=2&uid=70&uid=4&sid=21102074552353〕〔 The adoptive family of Sejanus counted two consuls among their ranks: Quintus Aelius Tubero (consul in 11 BC) and Sextus Aelius Catus (consul in 4), who was the father of Aelia Paetina, the second wife of the future Emperor Claudius. Sejanus' uncle, Junius Blaesus, distinguished himself as a military commander; he became proconsul of Africa in 21 and earned triumphal honors by crushing the rebellion of Tacfarinas.〔Tacitus, ''Annals'' III.72, III.73〕 According to the ancient historian Tacitus, Sejanus was also a former favourite of the wealthy Marcus Gavius Apicius, whose daughter may have been Sejanus' first wife Apicata.〔 With Apicata, Sejanus had three children, two sons and one daughter: Strabo, Capito Aelianus and Junilla.〔 Tacitus, ''Annals'' IV.3 〕〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sejanus」の詳細全文を読む スポンサード リンク
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