Saint Gregory the Great: he holds up before a heretic woman the Host in which Christ crucified appears. Engraving by F.… https://www.rawpixel.com/image/14006644/image-cartoon-face-jesus-christFree Image from public domain license
The Mass of Saint Gregory the Great by Adriaen Ysenbrandt https://www.rawpixel.com/image/14264287/the-mass-saint-gregory-the-great-adriaen-ysenbrandtFree Image from public domain license