Memento mori (1687 - 1749) by Raphaël Sadeler I, Christoph Schwarz, Pierre Gallays and Keizerlijk hof https://www.rawpixel.com/image/13781543/image-paper-cartoon-faceFree Image from public domain licenseNicolas Copernicus among other astronomers of the world. Process print after a wood engraving by J. Styfi and J. Holewinski… https://www.rawpixel.com/image/13985514/image-cartoon-person-artFree Image from public domain license