My purpose is to relate ... without either anger or zeal, motives from which I am far removed.
-- The Annals of Tacitus, book 15 chapter 44
Plubius Cornelius Tacitus was a well respected senator and historian in his day. In his Annals, he writes the following regarding about the fire that destroyed the city:
Consequently, to get rid of the report, 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 Pilatus, and a most mischievous superstition, thus checked for the moment, again broke out not only in Judæa, 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.
We can clearly read that what Tacitus wrote of Christus, matches what was recorded in the Gospels regarding the crucifixion of Jesus. It is one of the first historical references about the existence of Jesus that can be found outside any Biblical narrative!
So, if a secular historian and the Bible can confirm that Jesus existed, what are you waiting for?