A hot question mark in the disputed lists of Catholic popes is whether one of the (doubted) early-medieval Johns was in fact a cross-dressing Joan. Even if so, nothing would be known for sure. Shown is how it might have happened, and how little 'evidence' there is. Yet no definite answer can be given, merely why it would have been postulated, not crushed in the bud under Catholic supremacy and taken up after the Reformation divided Christian Europe.
—KGF Vissers