Sibylline Books
Modern scholars believe these books are not the same as the Sibylline Oracles that were often quoted by early Christian writers from the 2nd century through the 5th century AD. It is certain that when one Christian writer, Athenagoras of Athens, wrote A Plea for the Christians to Emperor Marcus Aurelius in around 176 AD, at a time when Christians were being punished by the pagan Roman Empire, he quoted word-for-word from these Oracles that are known today. Quoting them along with writings by Homer and Hesiod, he wrote many times that "these books are all known to Caesar" (the Emperor). The Sibylline Books were still to be found in the Temple of Apollo at Rome at this time, so it is thought possible that at least some of these Sibylline Oracles were partly the same.