In book 2, chapter 19, Molanus discusses how one should deal with artworks depicting matters from unestablished textual traditions. Foremost is that no false stories are depicted, but in the case of artworks based on uncertain stories, propriety and probability should prevail in the judgement and above all the common opinion of the whole Church. The matters discussed in this chapter can be considered part of a greater discussion on the liberty of artists in Molanus’ treatise, see also book 2, chapter 2.
“So far we have dealt with what concerns images and comes from stories or well-founded reasons. But since the Church does not indulge in the uncertain, nor does she indulge in the false, no one will judge that paintings should be censured when they show in their works what is not found in the accounts. Indeed, when they do so, it is not only according to probability and propriety and prompted by necessity, but moreover, the common opinion of the whole Church and its unanimous agreement approve it.”
“Et ista quidem hactenus de imaginibus desumptis ex historiis aut rationibus solidis. Quia vero nullis incertis ac proinde nex falsis Ecclesia delectatur, nemo arbitretur pictores in eo reprehendos esse, quod quaedem in picturis exprimant quae in historiis non habentur. Hoc enim non solum probabiliter et convenienter, sed et necessario quandoque faciunt et communi quodam totius Ecclesia sensu atque consensu approbatur.”
Molanus 1996, 175.