The Overturned Bouquet by Abraham Mignon (1660-1679). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/503790/free-illustration-image-renaissance-flowers-painting-still-lifeFree Image from public domain licenseProcession of Boats on the River Cam below Clare College, Cambridge by Richard Banks Harraden https://www.rawpixel.com/image/9491528/image-clouds-art-sunsetFree Image from public domain licenseView of Koblenz with the Rhine and Fortress Ehrenbreitstein (recto); View of the Heidelberg Castle (verso) by Johann Adam… https://www.rawpixel.com/image/14261121/image-paper-art-skyFree Image from public domain license