Adolf Harnack 
Expansion of Christianity in the First Three Centuries [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. J osephus, the Jewish writer at the close of the first century, completely ignores the Christian movement; for his so-called’ testimony to Jesus is a Christian interpolation. He may have deliberately ignored it. Nevertheless, we may infer from his silence that Christianity was numerically insignificant among the religious movements of the age. Even at a much later period it was unnoticed by historians. Herodian, for example, who wrote (about 240 a.d.) a comprehensive history of the period between the death of Marcus Aurelius and the accession Of Gordian III., never mentioned it.