Sibylline Books
Gallus was a member of the college of "quindecimviri sacris faciundis". In AD 32 he asked the senate to vote on a resolution about including a new collection of Sibylline oracles in the state’s official collection of Sibylline Books. Although the senate agreed, the emperor Tiberius rebuked Caninius Gallus for being rash and not following correct religious procedures, and the matter was referred to the full college of the "quindecimviri sacris faciundis".