Edward Jenner. Stipple engraving by E. Scriven after J. R. Smith, 1800. https://www.rawpixel.com/image/13990424/edward-jenner-stipple-engraving-scriven-after-smith-1800Free Image from public domain licenseSilhouette seagulls, dark cloud sky. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3299162/free-photo-image-bird-silhouette-animalFree Image from public domain licenseFree 2 cows standing on grass image, public domain animal CC0 photo. https://www.rawpixel.com/image/5902901/photo-image-background-public-domain-greenFree Image from public domain licenseIllustrations of China and its people : a series of two hundred photographs, with letterpress descriptive of the places and… https://www.rawpixel.com/image/13994608/photo-image-face-person-skyFree Image from public domain licenseFox looking away on rock. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3304348/free-photo-image-fox-wolf-animalFree Image from public domain licenseLeonardo da Vinci. Mezzotint by C. Townley, 1777, after Leonardo. https://www.rawpixel.com/image/13989114/leonardo-vinci-mezzotint-townley-1777-after-leonardoFree Image from public domain licenseAn illuminated city with more than half a dozen large buildings and skyscrapers with blue lights in the background. Original… https://www.rawpixel.com/image/3283532/free-photo-image-office-night-city-stageFree Image from public domain licenseThe landmark Eiffel Tower in Paris, France with a gray background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3285417/free-photo-image-travel-landmarks-arch-archedFree Image from public domain licenseSoldaat (1898) by William Nicholson and William Ernest Henley https://www.rawpixel.com/image/13770423/soldaat-1898-william-nicholson-and-william-ernest-henleyFree Image from public domain licenseW for Waitress (1898) by William Nicholson and William Heinemann https://www.rawpixel.com/image/13770404/for-waitress-1898-william-nicholson-and-william-heinemannFree Image from public domain licenseA child with two heads joined at the vertex. Line engraving by J. Basire after W. Bell. https://www.rawpixel.com/image/13954711/image-cartoon-face-personFree Image from public domain licenseGiuseppe Garibaldi, head and shoulders. Chromolithograph, ca. 1880. https://www.rawpixel.com/image/13951229/giuseppe-garibaldi-head-and-shoulders-chromolithograph-ca-1880Free Image from public domain licenseA man sitting on a chair. Gouache painting by an Indian artist. https://www.rawpixel.com/image/13955119/man-sitting-chair-gouache-painting-indian-artistFree Image from public domain licenseCow Poxed, Ox Faced Boy - illustration to "Cow-Pox Inoculation No Security Against Small-Pox Infection" by W. Rowley. https://www.rawpixel.com/image/14015714/image-face-cow-personFree Image from public domain licenseArmand Trousseau. Lithograph by J.B.A. Lafosse, 1866, after P. Petit. https://www.rawpixel.com/image/13995536/armand-trousseau-lithograph-jba-lafosse-1866-after-petitFree Image from public domain licenseLa Vierge aux Rocheres, by L. da Vinci by Caldesi and Montecchi https://www.rawpixel.com/image/14315774/vierge-aux-rocheres-vinci-caldesi-and-montecchiFree Image from public domain licenseNeon sign reads "PARK" on a dark building in New York. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283564/free-photo-image-neon-sign-new-york-architectural-detailFree Image from public domain licenseFree sheep behind a barb wire fence image, public domain animal CC0 photo. https://www.rawpixel.com/image/5906880/photo-image-background-public-domain-natureFree Image from public domain licenseThe circulatory system: dissection of the thigh of a man, with the arteries and veins indicated in red and blue. Coloured… https://www.rawpixel.com/image/13981325/image-face-person-artFree Image from public domain licenseFree red glass ball, Christmas ornament image, public domain holiday CC0 photo. https://www.rawpixel.com/image/5925055/photo-image-background-xmas-public-domainFree Image from public domain licenseA country barber shaving a man; a woman stands on the left. Gouache, 18--. https://www.rawpixel.com/image/13959400/country-barber-shaving-man-woman-stands-the-left-gouache-18Free Image from public domain licenseSir Benjamin Thompson, Count von Rumford. Stipple engraving by J.P.P. Rauschmayr after M. Kellerhoven, 1792. https://www.rawpixel.com/image/14005072/image-face-person-artFree Image from public domain licenseWilliam Henry. Mezzotint by H. Cousins, 1838, after J. Lonsdale. https://www.rawpixel.com/image/13987910/william-henry-mezzotint-cousins-1838-after-lonsdaleFree Image from public domain licenseAdrianus Junius [Adriaen de Jonghe]. Line engraving after P. Galle, 1572. https://www.rawpixel.com/image/13977812/adrianus-junius-adriaen-jonghe-line-engraving-after-galle-1572Free Image from public domain licenseMajor General Sir William Mansfield [and] General Sir Colin Campbell https://www.rawpixel.com/image/14271796/major-general-sir-william-mansfield-and-general-sir-colin-campbellFree Image from public domain licenseEdward Bright, a man weighing forty three and a half stone. Line engraving by A. Walker, 1751. https://www.rawpixel.com/image/14017349/image-cartoon-face-personFree Image from public domain licenseThree churchmen: John Wesley, William Paley, and Beilby Porteus. Engraving. https://www.rawpixel.com/image/13980561/three-churchmen-john-wesley-william-paley-and-beilby-porteus-engravingFree Image from public domain licenseA man holding a skull. Engraving by Johann Jakob von Mechel. https://www.rawpixel.com/image/14012768/man-holding-skull-engraving-johann-jakob-von-mechelFree Image from public domain licenseFour Arapahoes, possibly Arapaho Chief Walk-u-betta and Members of His Band by William Stinson Soule https://www.rawpixel.com/image/14272265/image-face-person-woodenFree Image from public domain licenseSaint Augustine of Canterbury. Line engraving by A. Lommelin, 16--. https://www.rawpixel.com/image/14019517/saint-augustine-canterbury-line-engraving-lommelin-16Free Image from public domain licenseJacobs-ladder - Polemonium pulcherrimum with a velvet mite (Balaustium sp.) by Jacob W. FrankMeet Yellowstone’s… https://www.rawpixel.com/image/4038235/photo-image-flower-plant-summerFree Image from public domain licenseWilliam Ruddiman. Stipple engraving by A. Cardon after J. Smart. https://www.rawpixel.com/image/13995271/william-ruddiman-stipple-engraving-cardon-after-smartFree Image from public domain license"Horror" from Le Brun, Bowles's Passions of the soul, circa 1785 https://www.rawpixel.com/image/13979078/horror-from-brun-bowless-passions-the-soul-circa-1785Free Image from public domain licenseThomas Britton. Stipple engraving by Maddocks after J. Wollaston, 1703. https://www.rawpixel.com/image/14005597/thomas-britton-stipple-engraving-maddocks-after-wollaston-1703Free Image from public domain licenseNicolas Léméry. Line engraving by N. Pitau after L.E. Ferdinand. https://www.rawpixel.com/image/13981479/nicolas-lemery-line-engraving-pitau-after-le-ferdinandFree Image from public domain licenseSir Henry Enfield Roscoe. Photogravure by Rich & Co., 1914, after D. Roscoe. https://www.rawpixel.com/image/13988965/sir-henry-enfield-roscoe-photogravure-rich-co-1914-after-roscoeFree Image from public domain licenseValeriano Luigi Brera. Stipple engraving by A. Tardieu, 1828. https://www.rawpixel.com/image/13987078/valeriano-luigi-brera-stipple-engraving-tardieu-1828Free Image from public domain licenseJoseph Black. Stipple engraving by C. Cook after H. Raeburn. https://www.rawpixel.com/image/14003409/joseph-black-stipple-engraving-cook-after-raeburnFree Image from public domain licenseUnidentified woman with her hair in a bun, crucifix around her neck, printed in vignette-style by J B Scholl https://www.rawpixel.com/image/14308011/image-face-person-artFree Image from public domain license