TheTiburtine Sibyl orAlbunea^[1] was aRomansibyl, whose seat was the ancientEtruscan town of Tibur (modernTivoli).

The mythic meeting ofAugustus with the Sibyl, of whom he inquired whether he should be worshiped as a god, was often depicted by artists from thelate Middle Ages onwards. In the versions known to the later Middle Ages, for example the account in theGolden Legend, Augustus asked the Sibyl whether he should be worshipped as a god, as theRoman Senate had ordered. She replied by showing him a vision of a young woman with a baby boy, high in the sky, while a voice from the heavens said "This is the virgin who shall conceive the saviour of the world", who would eclipse all the Roman gods. The episode was regarded as a prefiguration of theBiblical Magi's visit to the new-born Jesus and connected Ancient and Christian Rome, implying foreknowledge of the coming of Christ by the greatest of Roman emperors.^[2][3]

Whether the sibyl in question was theEtruscan Sibyl of Tibur or theGreek Sibyl ofCumae is not always clear. The Christian authorLactantius identified the sibyl in question as the Tiburtine sibyl. He gave a circumstantial account of the pagan sibyls that is useful mostly as a guide to their identifications, as seen by 4th-century Christians:

The Tiburtine Sibyl, by name Albunea, is worshiped at Tibur as a goddess, near the banks of theAnio, in which stream her image is said to have been found, holding a book in her hand. Heroracular responses the Senate transferred into the capitol.

— Divine Institutes I.vi

An apocalyptic pseudo-prophecy exists among theSibylline Oracles, which was attributed to the Tiburtine Sibyl. Its earliest version may date from the fourth century, but in the form that it survives today it was written in the early eleventh century, and has been influenced by theApocalypse of Pseudo-Methodius.^[4] Its first version in Latin dates from the tenth century and may have come from Lombardy, though it was quickly picked up (and rewritten) by theSalian dynasty and theHohenstaufens. It proved a useful rhetorical tool, valuable for many a ruler; the lists it contained of emperors and kings were revised to fit the circumstances, and hundreds of versions remain from the Middle Ages.^[5]

Its conclusion purports to prophesy the advent in the world's ninth age of afinal Emperor vanquishing the foes of Christianity (heavily dependent on the Apocalypse of Pseudo-Methodius):

Then will arise a king of the Greeks whose name is Constans. He will be king of the Romans and the Greeks. He will be tall of stature, of handsome appearance with shining face, and well put together in all parts of his body...

This Emperor's reign is characterized by great wealth, victory over the foes of Christianity, an end of paganism and the conversion of the Jews. The Emperor having vanquishedGog and Magog,

After this he will come to Jerusalem, and having put off the diadem from his head and laid aside the whole imperial garb, he will hand over the empire of the Christians to God the Father and to Jesus Christ his Son.

In doing so, he will give way to theAntichrist:

At that time the Prince of Iniquity who will be called Antichrist will arise from thetribe of Dan. He will be theSon of Perdition, the head of pride, the master of error, the fullness of malice who will overturn the world and do wonders and great signs through dissimulation. He will delude many by magic art so that fire will seem to come down from heaven. ... When theRoman Empire shall have ceased, then the Antichrist will be openly revealed and will sit in the House of the Lord in Jerusalem.

The prophecy relates that Antichrist would be opposed by theTwo Witnesses from theBook of Revelation, identified withElijah andEnoch; after having killed the witnesses and started a final persecution of the Christians,

the Antichrist will be slain by the power of God throughMichael the Archangel on theMount of Olives.

Ippolito II d'Este rebuilt theVilla d'Este at Tibur, the modernTivoli, from 1550 onward, and commissioned elaborate fresco murals in the Villa that celebrate the Tiburtine Sibyl, as prophesying the birth of Christ to the classical world.

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  Fresco in the Church ofSt. John the Evangelist atTivoli, 1483
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  The Tiburtine sibyl and the Emperor Augustus, a 16th-century chiaroscuro woodcut byAntonio da Trento
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  Emperor Augustus and the Sibyl of Tibur, 1520s painting by circle ofJan van Scorel,National Museum inWarsaw
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  Engraving of the Tiburtine Sibyl byPhilip Galle, after a design byAntony van Blokland, Antwerp, 1575.
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  Augustus and the Sibyl, byAntoine Caron,Louvre Museum
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  The Tiburtine Sibyl, Chapel Marciac, Church of Santissima Trinità dei Monti, Rome, sixteenth century. The work is of an anonymous artist.
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  Statue of the Tiburtine Sibyl inChurch of the Scalzi
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  Micah and the Tiburtine Sibyl byPinturicchio
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  Augustus and the Tiburtine Sibyl byWolfgang Katzheimer

Wikimedia Commons has media related toSibyl of Tibur.

• Arabic Sibylline prophecy
• Apocalypse of Pseudo-Methodius
• Temple of the Sibyl

• Hall, James,Hall's Dictionary of Subjects and Symbols in Art, 1996 (2nd edn.), John Murray,ISBN 0719541476
• Murray, Peter and Linda, revised Tom Devonshire Jones,The Oxford Dictionary of Christian Art & Architecture, 2014, Oxford University Press,ISBN 9780199695102, 0199695105
• Reyniers, Jeroen, 'The Iconography of Emperor Augustus with the Tiburtine Sibyl in the Low Countries. An Overview', in: M. Cavalieri, D. Engels, P. Assenmaker, M. Cavagna (ed.), Augustus Through the Ages: Receptions, Readings and Appropriations of the Historical Figure of the First Roman Emperor, Collection Latomus, Brussels, 2021.
• Fischer, Jens, 'Folia ventis turbata – Sibyllinische Orakel und der Gott Apollon zwischen später Republik und augusteischem Principat (Studien zur Alten Geschichte 33)', Göttingen 2022

• The Pseudo-Tiburtine prophecy, datedca 380, with additions (e-text)
• Review of the bookNel segno della Sibilla Tiburtina

• Ancient Roman religion
• Sibyls
• Cultural depictions of Augustus

• Articles with short description
• Short description matches Wikidata
• Commons category link is on Wikidata