Was Jeanne d'Arc crazy: Did Catherine of Alexandria exist according to the Catholic church?

I've found on atheistic site that Jeanne d'Arc was crazy, because she heard voices from Catherine of Alexandria, and that this saint never existed and was recognized as such by the Catholic church. [Non, Mélenchon ne diffame pas Jeanne d'Arc](http://rationalisme.free.fr/melenchonjeanne.htm) In French: *Parmi les "voix" qu'elle entendait : sainte Catherine d’Alexandrie. Or l'Eglise a reconnu depuis que cette sainte n'avait pas existé, que c'était une légende.* Translation, after a text explaining why she was crazy: > Among the "voices", Ste Catherine of Alexandria, but the (Catholic) Church has since recognized that this saint did never exist, that it was only a legend. On the other hand, the wikipedia page about this saint, or Christian sites explain the opposite. So who is right, and who is lying here? **So, was Jeanne d'Arc crazy or a real saint?** Considering the other points in this same French page, I will probably open another question if there's a lot to say about Saint Catherine.