I'm afraid I've lost the trail here, naomi… we were talking about two prophecies… Matthew 16: 27, 28 and Mark 14: 60-64, which are distinctly different. My response about the witnessed Transfiguration applied, obviously, only to Matthew's record. If I'm confused, please forgive the error.
There's quite a bit of historical evidence actually. For the sake of brevity, I'd point to Cornelius Tacitus':
"Cornelius Tacitus, born circa 52-55 C.E., became a senator in the Roman government under Emperor Vespasian. He was eventually promoted to governor of Asia. Writing in the year 116 C.E., in his Annals, he writes of the burning of Rome in 64 C.E. And how Caesar Nero had tried to stop the rumor that he (Nero) was behind the destruction.
He writes:
"Therefore, to scotch the rumor (that Nero had burned Rome) Nero substituted as culprits, and punished with the utmost refinements of cruelty, a class of men, loathed for their vices, whom the crowd styled Christians. Christus, the founder of the name, had undergone the death penalty in the reign of Tiberius, by sentence of the procurator Pontius Pilatus, and the pernicious superstition was checked for a moment, only to break out once more, not merely in Judea, the home of the disease, but in the capital itself, where all things horrible or shameful in the world collect and find a vogue...They [the Christians] were covered with wild beasts' skins and torn to death by dogs; or they were fastened on crosses, and, when daylight failed were burned to serve as lamps by night. Nero had offered his gardens for the spectacle, and gave an exhibition in his circus, mixing with the crowd in the habit of a charioteer, or mounted on his car. Hence, in spite of a guilt which had earned the most exemplary punishment, there arose a sentiment of pity, due to the impression that they were being sacrificed not for the welfare of the state but to the ferocity of a single man."[9]
This amazing document verifies that Jesus, or Christus, was a true historical figure, that he lived and was killed during the reign of Caesar Tiberius, that he was sentenced under Pontius Pilate and that by about 64 C.E., Christianity had spread rapidly throughout the Roman empire. Tacitus verifies that Christians were viciously tortured by Nero only 32 years after the death of Jesus of Nazareth. The historical validity of this letter by Tacitus is doubted by very few scholars. According to some scholars, Tacitus is:
"Universally considered the most reliable of historians, a man in whom sensibility and imagination, though lively, could never spoil a critical sense rare in his time and a great honesty in the examination of the documents." [Amoit, Francois; Brunot, Amedee; Danielou, Jeah; Daniel-Rops, Henri. The Sources for the Life of Christ. Translated by P.J. Herpburne-Scott. New York; Hawthorn Books, 1962, pg. 16.]
Apologies for my tardiness, but duty sometimes calls...