Speculum Romanae Magnificentiae: Plan of Ancient Rome by Pirro Ligorio https://www.rawpixel.com/image/9612060/speculum-romanae-magnificentiae-plan-ancient-rome-pirro-ligorioFree Image from public domain licensePlattegrond van Ferrara (1735) by anonymous and erven J Ratelband and Co https://www.rawpixel.com/image/13750106/plattegrond-van-ferrara-1735-anonymous-and-erven-ratelband-andFree Image from public domain licenseGezicht op Ferrara in vogelvluchtperspectief (1693 - 1717) by Wenceslaus Hollar and Anna Beeck https://www.rawpixel.com/image/13768229/image-paper-book-patternFree Image from public domain license