After combing through many collected images, I chose the ones above. The Virgin Marys on the outer edges are statues, which (I hope) will read as tangible, three-dimensional figures. The next women in are images from paintings, while the women closet to the center - to the witch - are drawings. So, as we get closer to the B&W image of the burning witch, the women become flatter, less detailed. They become less real. Which is what the Malleus Maleficarum did, transforming women from human beings to imagined monsters.
I need a background setting for the scene. There are all sorts of ‘Medieval cathedral interior’ images online: