Because Newsweek has resurrected many debunked theories that Jesus was a mass figment of the imagination, it is necessary to remind people that there is a good deal of historical evidence that such a man did exist. Here is a nice summary of the evidence, outside the gospels, of Jesus' existence. There is not much outside the gospels, but so what. The earliest gospels are dated to within 20 years of Jesus' death.
To dispute that Jesus was the son of God, is reasonable. To dispute that Jesus ever lived, is, historically, unreasonable.
Evidence of Jesus outside the Bible