The poet Albius Tibullus mentions that Messallinus was admitted into the quindecimviri sacris faciundis, the collegia in charge of the Sibylline Books. Syme notes that the date of Messallinus' admission was before the poet's death in 19 BC, and argues the admission was in 21 BC. He served as a consul in 3 BC. In AD 6, Messallinus served as a governor in Illyricum. During his time in Illyricum, he served with Tiberius with distinction in a campaign against the Pannonians and Dalmatians in the uprising of the Great Illyrian Revolt with the half-strength Legio XX Valeria Victrix. Messallinus defeated the Pannonii, led by Bato the Daesitiate, and prevented the spreading of the uprising. For his defeat over Bato, Messallinus was rewarded with a triumphal decoration and a place in the procession during Tiberius’ Pannonian triumph in AD 12, four years after the death of his father. In the first session of the Senate after Tiberius ascended to the imperial throne in AD 14, Messallinus suggested that an oath of allegiance should be sworn to the emperor yearly. Tiberius declined this offer, then asked if this motion was his own idea. Messallinus replied that it was a spontaneous suggestion, meant to show public spirit, even at the risk of his own safety. He next appears in history six years later, in AD 20, as part of the outcome of the trial and execution of Gnaeus Calpurnius Piso. Tacitus notes that Messallinus, along with Caecina Severus, proposed a golden statue be placed in the temple of Mars the Avenger, and an altar dedicated to Vengeance, in celebration of the execution of Piso. Emperor Tiberius blocked the motion, pointing out that victories over foreign powers were commemorated with such acts, but domestic conflicts should be shrouded in silent grief. Messallinus was recorded as also proposing that public thanks be given to Tiberius and other individuals for having avenged Germanicus. When Lucius Nonius Asprenas pointedly asked if Messallinus had intentionally omitted all mention of Claudius in his proposal, the future emperor was then added. Messallinus also appears as one of seven witnesses of the Senatus consultum de Cn. Pisone patre, the Roman Senate's official act concerning the trial and punishment of Piso. The last time Tacitus mentions Messallinus is in his account of AD 21, when he spoke against a motion before the Senate to forbid senators from bringing their wives with them when leaving to govern a province. Syme hints that Messallinus died not long after, noting that Tacitus provided no obituary notice for the senator, concluding that "the oration did service as a conspicuous exit."
Literature
Tibullus is not the only poet to mention Messallinus. From his exile at Tomis, the poet Ovid addressed as many as three poems to him. Ovid's Tristia comprises poems written during his travel into exile, and his first years at Tomis, none of which mention names. Syme explains this omission "ostensibly to avoid embarrassment". Despite this, Syme is confident that one of the poems in Tristia is addressed to Messalinus. After beginning with a compliment to noble birth, to noble character, and to eloquence inherited from his father, Ovid pleads with Messalinus to intervene with Augustus to recall him from exile. The next other two poems are part of his three-book collection titled Epistulae ex Ponto, in elegiacs like Tristia, but providing the names of the addressees of the poems unlike Trisita. Syme dates the first poem to AD 12, and the second to the following year. Both repeat Ovid's pleas for help to be recalled from Tomis. "The three pieces to his address fail to disclose any close personal relationship, common acquaintances, or liking for poetry," Syme observes, and contrasts this to Ovid's relationship with Messalinus' brother Cotta Maximus. "Ovid knew him from the cradle, he mentions in 11 his wife and new-born son."
