Sibylline Books
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.