The Roman historian Tacitus, considered to be the most reliable historian of his time, and a diligent researcher with access to now lost Roman records, wrote concerning Nero's attempt to take the blame for the fire of Rome off himself by blaming Christians:
“But not all the relief that could come from man, not all the bounties that the prince could bestow, nor all the atonements which could be presented to the gods, availed to relieve Nero from the infamy of being believed to have ordered the conflagration, the fire of Rome. Hence to suppress the rumor, he falsely charged with the guilt, and punished Christians, who were hated for their enormities. Christus [Latin for Christ], the founder of the name, was put to death by Pontius Pilate, procurator of Judea in the reign of Tiberius: (Annals 15.44)
http://en.wikipedia.org/wiki/Tacitus_on_Jesus
William F. Albright, who in his day was the world's foremost biblical archaeologist, said: "We can already say emphatically that there is no longer any solid basis for dating any book of the New Testament after about A.D. 80, two full generations before the date between 130 and 150 given by the more radical New Testament critics of today."
http://www.leaderu.com/everystudent/easter/articles/josh2.html
Flavius Josephus (c. 37–c. 100), a Jew and Roman citizen who worked under the patronage of the Flavians, wrote the Antiquities of the Jews in 93. In it Jesus is mentioned twice, notably in the Testimonium Flavianum, found in Antiquities 18:3.3:
About this time came Jesus, a wise man, if indeed it is appropriate to call him a man. For he was a performer of paradoxical feats, a teacher of people who accept the unusual with pleasure, and he won over many of the Jews and also many Greeks. He was the Christ. When Pilate, upon the accusation of the first men amongst us, condemned him to be crucified, those who had formerly loved him did not cease [to follow him], for he appeared to them on the third day, living again, as the divine prophets foretold, along with a myriad of other marvellous things concerning him. And the tribe of the Christians, so named after him, has not disappeared to this day.
Pliny the Younger, the provincial governor of Pontus and Bithynia, wrote to Emperor Trajan c. 112 concerning how to deal with Christians, who refused to worship the emperor, and instead worshiped "Christus".
“They asserted, however, that 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. When this was over, it was their custom to depart and to assemble again to partake of food—but ordinary and innocent food.”
Suetonius, refers to Christ around 120 CE writing in “The Lives of the Caesars,” Since the Jews constantly made disturbances at the instigation of Chrestus ["useful one"] expelled them from Rome." (Claudius 5.25.4). For disputations about the name Chrestus rather than Christus, see here
"Since the Jews constantly made disturbances at the instigation of Chrestus [Emperor Claudius in 49 CE] expelled them from Rome." (Claudius 5.25.4)
Celsus, a late second-century critic of Christianity, accused Jesus of being a bastard child and a sorcerer, he never questions Jesus' historicity even though he hated Christianity and Jesus.[23] He is quoted as saying that Jesus was a "mere man".
http://en.wikipedia.org/wiki/Historicity_of_Jesus
Thullus (c. 50-75AD): His writings have disappeared but we know of them from the writing of others, such as Julius Africanus (about AD 221). In them Thullus references to the darkness that occurred at the crucifixion and suggests that a total eclipse was the cause. Julius points out in his writing the impossibility of this since the festival of Passover, when Jesus was crucified, occurs at full moon (eclipses only occur at a new moon).
http://www.whybelieve.com/lifechallenge0ph.htm
PHLEGON was another first century historian whose 'Chronicles' have been lost, but he is quoted by other early writers. He also mentions the darkness at the crucifixion of Jesus and proposes the total eclipse theory.
Mara Bar-Serapion (pagan)
What advantage did the Athenians gain from putting Socrates to death? Famine and plague came upon them as a judgment for their crime. What advantage did the men of Samos gain from burning Pythagoras? In a moment their land was covered with sand. What advantage did the Jews gain from executing their wise king? It was just after that that their kingdom was abolished. God justly avenged these three wise men: the Athenians died of hunger; the Samians were overwhelmed by the sea; the Jews, ruined and driven from their land, live in complete dispersion. But Socrates did not die for good; he lived on in the teaching of Plato. Pythagoras did not die for good; he lived on in the statue of Hera. Nor did the wise king die for good; he lived on in the teaching which he had given (quoted by F. F. Bruce, The New Testament Documents: Are They Reliable? Eerdmans Publishing Co., Fifth Revised Edition, p. 114).
http://www.tektonics.org/jesusexist/serapion.html
Simon Greenleaf (1783-1853), an atheistic principal founder of Harvard Law School, and Royal Professor of Law, set out to disprove the resurrection of Jesus Christ by applying the principles of law to the Four Gospels as well as other available accounts of the event. But this legal scholar came to the conclusion that the witnesses were reliable, and that the resurrection did in fact happen.