John Armstrong. Mezzotint by E. Fisher after Sir J. Reynolds. https://www.rawpixel.com/image/13976619/john-armstrong-mezzotint-fisher-after-sir-reynoldsFree Image from public domain licenseAlbertus Seba. Line engraving by J. Houbraken after J. M. Quinkhard. https://www.rawpixel.com/image/13984312/albertus-seba-line-engraving-houbraken-after-quinkhardFree Image from public domain licenseWorkmen fitting the metal casings for an underground tunnel. Wood engraving, 1868. https://www.rawpixel.com/image/14002235/image-cartoon-person-crossFree Image from public domain licenseThomas Bartholin. Line engraving by P. Pinchard, 1671, after H. Ditmer. https://www.rawpixel.com/image/13986515/thomas-bartholin-line-engraving-pinchard-1671-after-ditmerFree Image from public domain licenseMale lion with mane in wild yawning showing big teeth. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298076/free-photo-image-animal-lion-south-africaFree Image from public domain licenseA man administers an enema to a baby. Reproduction of a painting by J.A. Garemyn, 1778. https://www.rawpixel.com/image/13988565/image-face-person-artFree Image from public domain licenseGuillaume Rondelet [Rondeletius]. Line engraving by C. Ammon, 1652. https://www.rawpixel.com/image/13991501/guillaume-rondelet-rondeletius-line-engraving-ammon-1652Free Image from public domain licenseFree glass ball, Christmas ornament image, public domain holiday CC0 photo. https://www.rawpixel.com/image/5909061/image-background-xmas-public-domainFree Image from public domain license"Rouviere dans le role d'Hamlet" par Manet by Anatole Godet https://www.rawpixel.com/image/14273247/rouviere-dans-role-dhamlet-par-manet-anatole-godetFree Image from public domain licenseThe Gillies' Breakfast, (Braemar.) by George Washington Wilson https://www.rawpixel.com/image/14299263/the-gillies-breakfast-braemar-george-washington-wilsonFree Image from public domain licenseChristoph Gottwaldt. Line engraving by G. Edelinck after A. Stech. https://www.rawpixel.com/image/13980313/christoph-gottwaldt-line-engraving-edelinck-after-stechFree Image from public domain licenseJohann Nepomuk Rust. Lithograph by C. Hübner, 1828, after W. Wach. https://www.rawpixel.com/image/13998194/johann-nepomuk-rust-lithograph-hubner-1828-after-wachFree Image from public domain licenseKarner blue butterfly, green background. Original public domain image from Flickr https://www.rawpixel.com/image/4034978/photo-image-butterfly-forestsFree Image from public domain licenseThomas Pennant. Mezzotint by C. Tomkins, 1869, after T. Gainsborough, 1776. https://www.rawpixel.com/image/13991148/thomas-pennant-mezzotint-tomkins-1869-after-gainsborough-1776Free Image from public domain licenseRudolf Ludwig Karl Virchow. Photograph by J. C. Schaarwächter, 1891. https://www.rawpixel.com/image/13977309/rudolf-ludwig-karl-virchow-photograph-schaarwachter-1891Free Image from public domain licenseJames Currie. Stipple engraving by W. T. Fry, 1816, after T. Hargreaves. https://www.rawpixel.com/image/14007902/james-currie-stipple-engraving-fry-1816-after-hargreavesFree Image from public domain licenseA Chinese man seated with his neck fastened in a cangue or pillory; a whip at his feet and houses in the background.… https://www.rawpixel.com/image/13965336/image-background-cartoon-faceFree Image from public domain licenseJöns Jacob Berzelius. Line engraving by C. W. Sharpe after O. J. Soedermark. https://www.rawpixel.com/image/13995460/jons-jacob-berzelius-line-engraving-sharpe-after-soedermarkFree Image from public domain licenseNicolas-René-Dufriche, Baron Desgenettes. Lithograph by N. E. Maurin, 1832. https://www.rawpixel.com/image/14020648/nicolas-rene-dufriche-baron-desgenettes-lithograph-maurin-1832Free Image from public domain licenseDomenico Antonio - from a picture by H. Lehman by Robert Jefferson Bingham https://www.rawpixel.com/image/14314420/domenico-antonio-from-picture-lehman-robert-jefferson-binghamFree Image from public domain licenseClose-up of typebars in a typewriter. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3299676/free-photo-image-vintage-typewriters-metal-letrasFree Image from public domain licenseUnidentified well-groomed man with moustache by Seeley and Warnock https://www.rawpixel.com/image/14306496/unidentified-well-groomed-man-with-moustache-seeley-and-warnockFree Image from public domain licenseThomas John Barnardo. Photograph by Stepney Causeway Studio. https://www.rawpixel.com/image/14018412/thomas-john-barnardo-photograph-stepney-causeway-studioFree Image from public domain licenseUnidentified couple: woman, standing; man seated by Paul Bourgeois https://www.rawpixel.com/image/14306713/unidentified-couple-woman-standing-man-seated-paul-bourgeoisFree Image from public domain licenseSir Paul Rycaut. Line engraving, 1680, after R. White after Sir P. Lely. https://www.rawpixel.com/image/13977463/sir-paul-rycaut-line-engraving-1680-after-white-after-sir-lelyFree Image from public domain licenseTextured. Psalm “All glorious is the princess within her chamber; her gown is textured with gold.”. https://www.rawpixel.com/image/6074491/photo-image-textures-flower-public-domainFree Image from public domain licenseJohn Wallis. Stipple engraving by J. Hopwood after G. B. Cipriani. https://www.rawpixel.com/image/13987864/john-wallis-stipple-engraving-hopwood-after-ciprianiFree Image from public domain licenseUnidentified man seated on table, holding an opened book by Camille Silvy https://www.rawpixel.com/image/14304547/unidentified-man-seated-table-holding-opened-book-camille-silvyFree Image from public domain licensePortrait of M. and Mme. Jean-Gabriel Eynard by Jean Gabriel Eynard https://www.rawpixel.com/image/14272496/portrait-and-mme-jean-gabriel-eynard-jean-gabriel-eynardFree Image from public domain licenseTwo men, one cutting his finger-nails with a pair of scissors. Oil painting. https://www.rawpixel.com/image/13958497/two-men-one-cutting-his-finger-nails-with-pair-scissors-oil-paintingFree Image from public domain licenseSir Roderick Impey Murchison. Photograph by John & Charles Watkins. https://www.rawpixel.com/image/13973993/sir-roderick-impey-murchison-photograph-john-charles-watkinsFree Image from public domain licenseRené Descartes. Stipple engraving by A. Tardieu after F. Hals, 1649. https://www.rawpixel.com/image/14021535/rene-descartes-stipple-engraving-tardieu-after-hals-1649Free Image from public domain licenseAldobrandino da Siena. Line engraving by C. Faucci after G. Traballesi. https://www.rawpixel.com/image/13975772/aldobrandino-siena-line-engraving-faucci-after-traballesiFree Image from public domain licenseMungo Park. Stipple engraving by W. Ridley, 1799, after H. Edridge. https://www.rawpixel.com/image/13984405/mungo-park-stipple-engraving-ridley-1799-after-edridgeFree Image from public domain licenseKing Charles I holding holding the cap in which he was executed; a skull on pedestal to right. Etching, 16--. https://www.rawpixel.com/image/13991648/image-cartoon-face-personFree Image from public domain licenseFree green asparagus and smoked salmon tartare image, public domain CC0 photo. https://www.rawpixel.com/image/5925471/photo-image-background-flower-public-domainFree Image from public domain licenseSeventy Years ago my Darling, Seventy Years ago by Julia Margaret Cameron https://www.rawpixel.com/image/14285164/seventy-years-ago-darling-seventy-years-ago-julia-margaret-cameronFree Image from public domain licenseCoyote standing near Biscuit Basin, Yellowstone National Park. Original public domain image from Flickr https://www.rawpixel.com/image/4039857/coyote-near-biscuit-basinFree Image from public domain licenseLeopold Auenbrugger and his wife. Photograph by V.A. Heck. https://www.rawpixel.com/image/13982243/leopold-auenbrugger-and-his-wife-photograph-va-heckFree Image from public domain licensePrince Kung, the Emperor's Brother, The Imperial Commissioner and Signer of the Treaty by Felice Beato https://www.rawpixel.com/image/14313796/image-face-person-clothingFree Image from public domain licenseChrysostomus Matanasius (Thémiseul de Saint-Hyacinthe). Line engraving by Calotin after "Apelles". https://www.rawpixel.com/image/13974597/image-face-person-artFree Image from public domain licenseUnidentified man with long sideburns, in vignette-style by F Schwarzschild https://www.rawpixel.com/image/14284018/unidentified-man-with-long-sideburns-vignette-style-schwarzschildFree Image from public domain license