Josephus Flavius: Titus Flavius Josephus, born Joseph ben Matityahu, was a first-century Romano-Jewish scholar, historian and hagiographer, who was born in Jerusalem—then part of Roman Judea—to a father of priestly descent and a mother who claimed royal ancestry. According to WikiPedia Josephus recorded Jewish history, with special emphasis on the first century CE and the First Jewish–Roman War, including the Siege of Masada. His most important works were The Jewish War (c. 75) and Antiquities of the Jews (c. 94). The Jewish War recounts the Jewish revolt against Roman occupation (66–70). Antiquities of the Jews recounts the history of the world from a Jewish perspective for an ostensibly Roman audience. These works provide valuable insight into first century Judaism and the background of Early Christianity.
In Rome, in the year 93, Josephus published his history of the Jews. It has been alleged and disputed for centuries that Josephus included the following account:
About this time there lived Jesus, a wise man, if indeed one ought to call him a man. For he was one who performed surprising deeds and was a teacher of such people as accept the truth gladly. He won over many Jews and many of the Greeks. He was the Messiah. And when, upon the accusation of the principal men among us, Pilate had condemned him to a cross, those who had first come to love him did not cease. He appeared to them spending a third day restored to life, for the prophets of God had foretold these things and a thousand other marvels about him. And the tribe of the Christians, so called after him, has still to this day not disappeared.
Read more about this testimony of Josephus: