One could say of Jesus:Not one contemporaneous historical source among the papal histories knows anything about her; also, no mention is made of her until the middle of the thirteenth century. Now it is incredible that the appearance of a "popess", if it was an historical fact, would be noticed by none of the numerous historians from the tenth to the thirteenth century.
Not one contemporaneous historical source among the [Romans, Hebrews or Greeks] histories knows anything about [him]; also, no mention is made of [him] until[sixty years later]. Now it is incredible that the appearance of [the Son of God], if it was an historical fact, would be noticed by none of the numerous historians [for two generations].
Admittedly, the period of delay is longer for Joan than Jesus, but surely the arrival of the Son of God on Earth would be a big enough event to be recorded somewhere by a contemporary Roman, Hebrew or Greek scholar? Apparently not. His PR company should have been fired.