Virgil's epic poem recounting the journey of Aeneas from the fall of Troy to the founding of the line that would produce Rome — composed between 29 and 19 BCE at the request of Augustus and left unfinished at Virgil's death. The Aeneid performed a specific political function: it gave Rome a mythological origin equal in prestige to the Greek tradition while making Roman imperium seem divinely destined. Its world effect ran through the medieval and Renaissance imagination of empire, Dante's Commedia, and every subsequent literary culture that used it to legitimate political authority.
Virgil spent eleven years writing The Aeneid and still considered it unfinished when he died. His last instruction was that it should be burned. Augustus ignored him and published it anyway. The emperor understood something Virgil may have suspected: this poem was too politically useful to destroy. It gave Rome a mythological founding equal to Homer, made Augustus the culmination of divine prophecy, and embedded the idea of Roman destiny so deeply in the Western imagination that fourteen centuries later Dante would choose Virgil as his guide through Hell — not because Virgil was a Christian but because he was the poet of a civilization's self-understanding.