Josephus Flavius. A historian of the first century; a Hellenized Jew who lived in Alexandria and died at Rome. He was credited by Eusebius with having written the 16 famous lines relating to Christ, which were most probably interpolated by Eusebius himself, the greatest forger among the Church Fathers. This passage, in which Josephus, who was an ardent Jew and died in Judaism, is nevertheless made to acknowledge the Messiaship and divine origin of Jesus, is now declared spurious both by most of the Christian Bishops (Lardner among others) and even by Paley (see his Evidence of Christianity). It was for centuries one of the weightiest proofs of the real existence of Jesus, the Christ.
Source: H.P.Blavatsky - The Key to Theosophy, The theosophical glossary