There is overwhelming evidence for the existence of Jesus Christ, both in secular and biblical history. Perhaps the greatest evidence that Jesus did exist is the fact that literally thousands of Christians in the first century A.D., including the twelve apostles, were willing to give their lives as martyrs for Jesus Christ
The New Testament contains hundreds of references to Jesus Christ. There are those who date the writing of the Gospels to the second century A.D., more than 100 years after Jesus' death. Even if this were the case (which we strongly dispute), in terms of ancient evidences, writings less than 200 years after events took place are considered very reliable evidences. Further, the vast majority of scholars (Christian and non-Christian) will grant that the Epistles of Paul (at least some of them) were in fact written by Paul in the middle of the first century A.D., less than 40 years after Jesus' death. In terms of ancient manuscript evidence, this is extraordinarily strong proof of the existence of a man named Jesus in Israel in the early first century A.D.
In fact, we can almost reconstruct the gospel just from early non-Christian sources: Jesus was called the Christ (Josephus), did “magic,” led Israel into new teachings, and was hanged on Passover for them (Babylonian Talmud) in Judea (Tacitus), but claimed to be God and would return (Eliezar), which his followers believed, worshipping Him as God (Pliny the Younger).
The first-century Roman Tacitus, who is considered one of the more accurate historians of the ancient world, mentioned superstitious “Christians” (from Christus, which is Latin for Christ), who suffered under Pontius Pilate during the reign of Tiberius. Suetonius, chief secretary to Emperor Hadrian, wrote that there was a man named Chrestus (or Christ) who lived during the first century (Annals 15.44).
Flavius Josephus is the most famous Jewish historian. In his Antiquities he refers to James, “the brother of Jesus, who was called Christ.” Pliny the Younger, in Letters 10:96, recorded early Christian worship practices including the fact that Christians worshiped Jesus as God and were very ethical, and he includes a reference to the love feast and Lord’s Supper. The Babylonian Talmud (Sanhedrin 43a) confirms Jesus' crucifixion on the eve of Passover and the accusations against Christ of practicing sorcery and encouraging Jewish apostasy.
According to a quote from Bart Erhman, regarding the existence of Jesus, "With respect to Jesus, we have numerous, independent accounts of his life in the sources lying behind the Gospels (and the writings of Paul) -- sources that originated in Jesus' native tongue Aramaic and that can be dated to within just a year or two of his life (before the religion moved to convert pagans in droves). Historical sources like that are is pretty astounding for an ancient figure of any kind. Moreover, we have relatively extensive writings from one first-century author, Paul, who acquired his information within a couple of years of Jesus' life and who actually knew, first hand, Jesus' closest disciple Peter and his own brother James. If Jesus did not exist, you would think his brother would know it. One may well choose to resonate with the concerns of our modern and post-modern cultural despisers of established religion (or not). But surely the best way to promote any such agenda is not to deny what virtually every sane historian on the planet -- Christian, Jewish, Muslim, pagan, agnostic, atheist, what have you -- has come to conclude based on a range of compelling historical evidence. Whether we like it or not, Jesus certainly existed." Source: "Did Jesus Exist?: The Historical Argument for Jesus of Nazareth,"
"Some of the earliest manuscript fragments of the New Testament are the John Rylands Fragment, Chester Beatty Papyrus and the Bodmer Papyrus which were written between 50-100AD. Copies of these papyri were reproduced in 125-200AD, meaning that the time span between the originals and the copies still in existence today is 29 years to 130 years, putting all these manuscripts beings written anywhere from 50-100 years after the death of Jesus Christ. Now some may object and say “Hold on! These manuscripts were written years after Jesus died. There’s no way they could be reliable!” But any expert on ancient documents would disagree.
Let’s look at some of the more famous and universally accepted historical documents and see how they match up with the Bible:
Plato — Plato wrote his works from 427-347 BC. The earliest manuscript copy of Plato’s writing in existence today was written in 900 AD. That is 1,200 years after Plato’s death! And there are only 2 copies of these manuscripts in existence. (source)
Julius Caesar — One of the most celebrated and trusted historical figures. Caesar lived from 100-44 BC and the earliest manuscript copy of his writings dates back to 900 AD, putting our best evidence of Caesar ever existing 1,000 years after his death. And there are 10 copies of ancient manuscripts of Caesar’s Gallic Wars. (source) So if you question the Bible based on when it was written, being “translated so many times” (it was not – we still have the same Greek manuscripts today) and still question whether Jesus existed, then you must also be really sure that Julius Caesar and Plato were completely fictional characters and never really existed.
Homer — Homer, who historians are not even sure ever really existed even today, is credited with writing the Iliad in ca 900 BC. The earliest manuscript copy of the Iliad dates to 400 BC. Meaning the only proof of Homer or the Iliad being accurate is from 500 years after the death of Homer. Additionally there are 643 copies of ancient manuscripts of the Iliad written over the centuries that when compared against each other by experts have a 95.3 consistency and accuracy, making it one of the most reliable and proven documents of antiquity. (source)
That is of course, until you compare it to the New Testament. The New Testament manuscripts date to less than 100 years after the death of Christ. Additionally there are over 5,600 ancient manuscript copies of the New Testament giving it more copies to a degree that dwarfs any other figure of ancient history (to view actual copies of some of these ancient manuscripts, see here). And they have a 99% accuracy when compared to each other. The evidence is not even comparable. And it all points to Jesus Christ. The record of the life, ministry, death and resurrection of Jesus Christ has more evidence and proof than any other person from antiquity."
Source: http://beginningandend.com/jesus-exist-historical-evidence-jesus-christ/