Constantin Francois Volney challenges the historicity of Jesus, cites lack of monuments and lack of apostolic authorship of Gospels.
Constantin Francois Volney, The Ruins: Or a Survey of the Revolutions of Empires, 3rd ed., (translated) (London: J. Johnson, 1796), 355
There are absolutely no other monuments of the existence of Jesus Christ as a human being, than a passage in Josephus. . . a single phrase in Tacitus. . . and the Gospels. But the passage in Josephus is unanimously acknowledged to be apocryphal, and to have been interpreted towards the close of the third century. . . and that of Tacitus is so vague, and so evidently taken from the deposition of the Christians before the tribunals , that it may be ranked in the class of evangelical records. "All the world knows," says Faustus, who, though a Manichean, was one of the most learned men of the third century, "All the world knows that the Gospels were neither written by Jesus Christ, nor his apostles, but by certain unknown persons, who, rightly judging that they should not obtain belief respecting things which they had not seen, placed at the head of their recitals the names of contemporary apostles. . .the existence of Jesus is no better proved than that of Osiris and Hercules, or that of Fôt or Bedou, with whom, says M. de Guignes, the Chinese continually confound him, for they never call Jesus by any other name than Fôt.