Small-pox: the face of a male sufferer. Photograph, 19--, of a photograph, ca. 1900 . https://www.rawpixel.com/image/13953887/photo-image-face-person-artFree Image from public domain licenseMungo Park. Stipple engraving by W. T. Fry, 1820, after H. Edridge. https://www.rawpixel.com/image/13986782/mungo-park-stipple-engraving-fry-1820-after-edridgeFree Image from public domain licenseSebastiano Scarabici. Line engraving by M. Desbois, 1682, after himself. https://www.rawpixel.com/image/13989434/sebastiano-scarabici-line-engraving-desbois-1682-after-himselfFree Image from public domain licenseTwo small yellow fluffy chicks standing next to each other. Original public domain image from Flickr https://www.rawpixel.com/image/3261848/free-photo-image-bird-animal-poultryFree Image from public domain licenseHermann Friedrich Teichmeyer. Line engraving after J. Kenckel. https://www.rawpixel.com/image/13959382/hermann-friedrich-teichmeyer-line-engraving-after-kenckelFree Image from public domain licenseUnidentified man with moustache and muttonchops by Frederick Gutekunst https://www.rawpixel.com/image/14308545/unidentified-man-with-moustache-and-muttonchops-frederick-gutekunstFree Image from public domain license"La Musique", Sculpture by Elias Robert, Decoration of the Louvre, Paris by Édouard Baldus https://www.rawpixel.com/image/14324558/image-face-person-artFree Image from public domain licenseSouth Africa: a Zulu medicine man preparing to draw blood by cupping, first making an incision in the patient's shoulder.… https://www.rawpixel.com/image/14020593/photo-image-people-medicine-artFree Image from public domain licenseUnidentified woman, printed in vignette-style by Gustav Dahms https://www.rawpixel.com/image/14306860/unidentified-woman-printed-vignette-style-gustav-dahmsFree Image from public domain licenseGeorg Noessler. Line engraving by P. Isselburg, 1622, after himself. https://www.rawpixel.com/image/13979724/georg-noessler-line-engraving-isselburg-1622-after-himselfFree Image from public domain licenseUnidentified woman with braided hair wrapped at the top of her head, in vignette-style by Thomas Houseworth https://www.rawpixel.com/image/14308154/photo-image-face-person-clothingFree Image from public domain licenseUnidentified man with beard sans moustache, printed in vignette-style https://www.rawpixel.com/image/14308450/unidentified-man-with-beard-sans-moustache-printed-vignette-styleFree Image from public domain licenseFree Christmas decoration on fireplace image, public domain holiday CC0 photo. https://www.rawpixel.com/image/5924702/photo-image-background-xmas-public-domainFree Image from public domain licenseInterior with an alchemist seated at a table, looking out of the picture. Oil painting by Thomas Wijck (Thomas Wyck). https://www.rawpixel.com/image/14003298/image-cartoon-person-artFree Image from public domain licenseSir Isaac Newton. Line engraving by A. de St Aubin after himself after J. Roettiers, 1739. https://www.rawpixel.com/image/13991637/image-face-person-artFree Image from public domain licenseJames Gregory. Stipple engraving by E. Harding after Count H. D. E. Buchan. https://www.rawpixel.com/image/14012101/james-gregory-stipple-engraving-harding-after-count-buchanFree Image from public domain licenseThe Pont Alexandre III across the Seine in Paris. Free public domain CC0 image. https://www.rawpixel.com/image/6043137/photo-image-public-domain-free-travelFree Image from public domain licenseFree Tower Bridge at night, London image, public domain CC0 photo. https://www.rawpixel.com/image/5920507/photo-image-background-lights-public-domainFree Image from public domain licenseGeorge Edward Wherry. Photograph by Palmer Clarke, Cambridge. https://www.rawpixel.com/image/13997891/george-edward-wherry-photograph-palmer-clarke-cambridgeFree Image from public domain licenseJohannes Koch. Mezzotint by G. Bodenehr after M. Schmid, 1740. https://www.rawpixel.com/image/13999802/johannes-koch-mezzotint-bodenehr-after-schmid-1740Free Image from public domain licenseFranci Nichollsii ... vita: cum conjecturis ejusdem de natura et usu partium humani corporis similarium / [Thomas Lawrence]. https://www.rawpixel.com/image/14004933/image-cartoon-face-frameFree Image from public domain licenseSir George Wharton. Line engraving by D. Loggan, 1661, after himself. https://www.rawpixel.com/image/13986603/sir-george-wharton-line-engraving-loggan-1661-after-himselfFree Image from public domain license