Benjamin Stillingfleet. Mezzotint by V. Green after J. Zoffany. https://www.rawpixel.com/image/13975945/benjamin-stillingfleet-mezzotint-green-after-zoffanyFree Image from public domain licenseChristoph Wilhelm Hufeland. Stipple engraving by A. Tardieu. https://www.rawpixel.com/image/13992129/christoph-wilhelm-hufeland-stipple-engraving-tardieuFree Image from public domain licenseJohann Christoph Troppaniger. Line engraving by M. Bernigeroth, 1729. https://www.rawpixel.com/image/14015330/johann-christoph-troppaniger-line-engraving-bernigeroth-1729Free Image from public domain licensePercival Pott. Stipple engraving by J. Heath, 1790, after Sir J. Reynolds. https://www.rawpixel.com/image/14011644/percival-pott-stipple-engraving-heath-1790-after-sir-reynoldsFree Image from public domain licenseSir William Fergusson. Photogravure after Rudolf Lehmann. https://www.rawpixel.com/image/14001010/sir-william-fergusson-photogravure-after-rudolf-lehmannFree Image from public domain licenseThe circulatory system: dissection of the back, shoulder, neck, and back of the head of a man, with blood vessels indicated… https://www.rawpixel.com/image/14006902/image-face-person-artFree Image from public domain licenseYellow fever: a scientist wearing a face mask works at a laboratory bench with bunsen burners and microscopes. Photograph… https://www.rawpixel.com/image/13982592/photo-image-face-person-clothingFree Image from public domain licenseUnidentified man in 3/4 profile, in quasi-oval style by Elliott and Fry https://www.rawpixel.com/image/14283850/unidentified-man-34-profile-quasi-oval-style-elliott-and-fryFree Image from public domain licenseSir Astley Paston Cooper. Engraving by W. H. Mote after Sir T. Lawrence. https://www.rawpixel.com/image/14001285/sir-astley-paston-cooper-engraving-mote-after-sir-lawrenceFree Image from public domain licenseSusan Macdowell (later Mrs. Thomas Eakins) with Setter by Thomas Eakins https://www.rawpixel.com/image/14284893/susan-macdowell-later-mrs-thomas-eakins-with-setter-thomas-eakinsFree Image from public domain licenseFree sea crab surfacing image, public domain aquatic animal CC0 photo. https://www.rawpixel.com/image/5920173/photo-image-background-public-domain-oceanFree Image from public domain licenseJohn Radcliffe. Line engraving by J. Fisher after Sir G. Kneller, 1710. https://www.rawpixel.com/image/13997351/john-radcliffe-line-engraving-fisher-after-sir-kneller-1710Free Image from public domain license"Sophia". Vaudeville Theatre./[Actor in tricorn hat, standing] by Window and Grove https://www.rawpixel.com/image/14305747/photo-image-face-person-clothingFree Image from public domain licenseSir John Frederick William Herschel. Wood engraving, 1871. https://www.rawpixel.com/image/13989949/sir-john-frederick-william-herschel-wood-engraving-1871Free Image from public domain licensePortret van Aernout van Overbeke (c. 1663 - 1699) by Hendrik Causé https://www.rawpixel.com/image/13781358/portret-van-aernout-van-overbeke-c-1663-1699-hendrik-causeFree Image from public domain licenseA barefoot man wearing a cloak, hat and beads: he is carrying a stick. Watercolour. https://www.rawpixel.com/image/13953031/image-cartoon-face-personFree Image from public domain licenseUnidentified elderly man with a long white beard, printed in vignette-style by C Fred Barr https://www.rawpixel.com/image/14284758/image-face-person-clothingFree Image from public domain licenseBenjamin Travers. Stipple engraving by H. Cook, 1839, after W. Behnes. https://www.rawpixel.com/image/14011774/benjamin-travers-stipple-engraving-cook-1839-after-behnesFree Image from public domain licenseRepresentative men in literature, science, and art / by Edward Walford ; the photographic portraits from life, by Ernest… https://www.rawpixel.com/image/14005679/photo-image-face-person-artFree Image from public domain licenseCaspar Neumann. Line engraving by J.G. Wolffgang, 1734, after A. Pesne. https://www.rawpixel.com/image/13977918/caspar-neumann-line-engraving-jg-wolffgang-1734-after-pesneFree Image from public domain licenseOude, India: two men holding long sticks. Photograph, ca. 1860. https://www.rawpixel.com/image/13979163/oude-india-two-men-holding-long-sticks-photograph-ca-1860Free Image from public domain licenseA member of the Mughal royal family . Watercolour drawing by an Indian artist. https://www.rawpixel.com/image/13965285/member-the-mughal-royal-family-watercolour-drawing-indian-artistFree Image from public domain licenseUnidentified young bearded man, standing by Robert M Boggs https://www.rawpixel.com/image/14308648/unidentified-young-bearded-man-standing-robert-boggsFree Image from public domain licenseUnidentified young boy wearing a soldier's uniform, holding a rifle with bayonet, standing by P R Young https://www.rawpixel.com/image/14306511/photo-image-face-people-clothingFree Image from public domain licenseA boy stands on a hill with a city behind him. Coloured engraving. https://www.rawpixel.com/image/13953905/boy-stands-hill-with-city-behind-him-coloured-engravingFree Image from public domain licenseAlbert Richard Smith. Stipple engraving by Cook, 1844, after C. Baugniet. https://www.rawpixel.com/image/14019037/albert-richard-smith-stipple-engraving-cook-1844-after-baugnietFree Image from public domain licenseSkyscraper windows with sky. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283324/free-photo-image-cityscape-apartment-building-architectureFree Image from public domain licenseA gamekeepers assistant (game-boy) putting his dog on a leash. Etching by J. H. Engleheart after W. Smith. https://www.rawpixel.com/image/14008033/image-dog-cartoon-faceFree Image from public domain licenseKop van een grijsaard en profil (1831 - 1904) by Arnoud Schaepkens https://www.rawpixel.com/image/13765046/kop-van-een-grijsaard-profil-1831-1904-arnoud-schaepkensFree Image from public domain licenseSaint Mary (the Blessed Virgin) with the Christ Child. Line engraving by C.H. Rahl after A. Allegri, il Correggio. https://www.rawpixel.com/image/14008537/image-face-christ-personFree Image from public domain licenseBulldog standing on grass field in town. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3291727/free-photo-image-dog-bulldog-canineFree Image from public domain licenseGeorge Birkbeck. Stipple engraving by J. Thomson after W. Derby. https://www.rawpixel.com/image/14014827/george-birkbeck-stipple-engraving-thomson-after-derbyFree Image from public domain licenseFriedrich Hoffmann I. Line engraving by C. Romstet after D. La Borie. https://www.rawpixel.com/image/14002224/friedrich-hoffmann-line-engraving-romstet-after-borieFree Image from public domain license