Historical sources outside of Scripture:
Cornelius Tacitus: 56-117AD, Roman Historian and Governor of Asia wrote in 112AD:
"Christ, 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 Judaea, the first source of the evil, but even in Rome"
Suetonius: 69-140 AD, Official historian of Rome in 125 AD spoke of the Jews being previously expelled from Rome, as Acts 18:2 also said:
"As the Jews were making constant disturbances at the instigation of Chrestus [Christ], he [ Claudius ] expelled them [the Jews] from Rome"
Pliny the Younger: 61-112AD, Governor of the Roman province of Bithynia wrote a letter to Emperor Trojan in 112AD:
"the sum and substance of their fault or error had been that they were accustomed to meet on a fixed day before dawn and sing responsively a hymn to Christ as to a god, and to bind themselves by oath, not to some crime, but not to commit fraud, theft, or adultery, not falsify their trust, nor to refuse to return a trust when called upon to do so."
Flavious Josephus: AD 37-100, published the work 'Antiquities of the Jews' in 94AD:
"Now there was about this time Jesus, a wise man, if it be lawful to call him a man; for he was a doer of wonderful works, a teacher of such men as receive the truth with pleasure. He drew over to him both many of the Jews and many of the Gentiles. He was [the] Christ. And when Pilate, at the suggestion of the principal men amongst us, had condemned him to the cross, those that loved him at the first did not forsake him; for he appeared to them alive again the third day; as the divine prophets had foretold these and ten thousand other wonderful things concerning him. And the tribe of Christians, so named from him, are not extinct at this day."
What we have established:
1. Jesus suffered the death penalty under Pontius Pilot. (Tacitus, Josephus, Matt 27)
2. The followers sang hymns to Christ as God. (Pliny the Younger, Jn 1:1)
3. The death of Christ "checked" followers "for a moment", but it "again broke out" post crucifixion. (Certainly it would have been over had Christ not risen.) (Tacitus, Lk 24:36-39)
4. The movement started in Judea and spread to Rome. (Tacitus, Suetonius, Acts 1:8, Romans)
2. The followers sang hymns to Christ as God. (Pliny the Younger, Jn 1:1)
3. The death of Christ "checked" followers "for a moment", but it "again broke out" post crucifixion. (Certainly it would have been over had Christ not risen.) (Tacitus, Lk 24:36-39)
4. The movement started in Judea and spread to Rome. (Tacitus, Suetonius, Acts 1:8, Romans)
Conclusion
We can clearly see that Jesus is a historical figure, and we need to make a decision as to what that means to us. He was not just a mere man, if the disciples stole the body as some suppose, they would not have been willing to die for a lie. However 11 of the 12 original disciples did end up giving their lives for the Gospel, certainly they must have known He was risen. Let us repent and believe today and see the Lord for who He truly is!