The five or so authentic epistles of Paul and the Roman recorder, Tacitus.
Tacitus was a member of the Roman consular nobility committed to the senatorial ideals of the Roman republic. He detested both Christians and Jews.
Tacitus wrote of the fire that consumed much of Rome in 64 C.E. during the reign of Nero and the chaos which followed the fire. Then Tacitus reported that Nero fixed blame for the disaster on Christians:
Nero fastened the guilt and inflicted the most exquisite tortures on a class hated for their abominations, called Christians by the populace. Christus, from whom the name had its origin, suffered the extreme penalty during the reign of Tiberius at the hands of one of our procurators, Pontius Pilate, and a most mischievous superstition, thus checked for the moment, again broke out not only in Judaea, and the first source of the evil, but even in Rome, where all things hideous and shameful from every part of the world find their centre and become popular. Accordingly, an arrest was first made of all who pleaded guilty; then, upon their information, an immense multitude was convicted, not so much of the crime of firing the city, as of hatred against mankind. Mockery of every sort was added to their deaths. Covered with the skins of beasts, they were torn by dogs and perished, or were nailed to crosses, or were doomed by the flames and burnt, to serve as a nightly illumination, when daylight had expired
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Also, Flavius Josephus, a Jewish historian, (A.D. 38-100+) wrote about Jesus in his Jewish Antiquities, saying that Jesus was a wise man who did surprising feats, taught many, won over followers from among Jews and Greeks, that Jesus was believed to be the Messiah, was accused by the Jewish leaders, was condemned to be crucified by Pilate, and was considered to be resurrected.2
The existence of Jesus Christ is recorded not only by Josephus and Tacitus, but also by ancient writers such as Suetonius, Thallus, Pliny the Younger, and Lucian. And from the Jewish Talmud, "we learn that Jesus was conceived out of wedlock, gathered disciples, made blasphemous claims about himself, and worked miracles, but these miracles are attributed to sorcery and not to God."