Robert Browning. Photograph by Julia Margaret Cameron, 1865. https://www.rawpixel.com/image/13998587/robert-browning-photograph-julia-margaret-cameron-1865Free Image from public domain licenseNo. 2. Case of John Frederick U.S.V. Side View. [Civil War victim] https://www.rawpixel.com/image/14310834/no-case-john-frederick-usv-side-view-civil-war-victimFree Image from public domain licenseGiovanni Battista della Porta. Lithograph by L. Aureli after Belloni. https://www.rawpixel.com/image/13972390/giovanni-battista-della-porta-lithograph-aureli-after-belloniFree Image from public domain licenseGeorges Simon Serullas. Halftone after lithograph by Palley. https://www.rawpixel.com/image/14004948/georges-simon-serullas-halftone-after-lithograph-palleyFree Image from public domain licenseFriedrich Hoffmann II. Reproduction of line engraving by F. G. Wolffgang, 1735, after A. Pesne. https://www.rawpixel.com/image/13998724/image-cartoon-person-artFree Image from public domain licenseWilliam Farish. Lithograph by I. W. Slater, 1835, after J. Slater, 1818. https://www.rawpixel.com/image/13976962/william-farish-lithograph-slater-1835-after-slater-1818Free Image from public domain licenseJohn Wesley. Line engraving by J. Tookey, 1791, after himself. https://www.rawpixel.com/image/13976713/john-wesley-line-engraving-tookey-1791-after-himselfFree Image from public domain licenseUnidentified Asian man in robe wearing hat, standing by F Schwarzschild https://www.rawpixel.com/image/14283669/unidentified-asian-man-robe-wearing-hat-standing-schwarzschildFree Image from public domain licenseJohn Evelyn. Line engraving by F. Bartolozzi, 1776, after himself. https://www.rawpixel.com/image/13990336/john-evelyn-line-engraving-bartolozzi-1776-after-himselfFree Image from public domain licenseFelix Plater [Platter]. Reproduction of line engraving by F. Hubert, 1784. https://www.rawpixel.com/image/14019301/felix-plater-platter-reproduction-line-engraving-hubert-1784Free Image from public domain licenseCalifornia Sea Lion (2009) by Mehgan Murphy. Original from Smithsonian's National Zoo. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/3061652/free-photo-image-amazing-animal-artFree Image from public domain licenseJohn Ring. Stipple engraving by J. Rogers, 1824, after S. Drummond. https://www.rawpixel.com/image/14013597/john-ring-stipple-engraving-rogers-1824-after-drummondFree Image from public domain licenseLegs outstretched into mountain, sunset background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3300948/free-photo-image-animals-images-pictures-ankle-apparelFree Image from public domain licenseAn Arabic man of learning (Avicenna ). Oil painting by a Neapolitan painter, 17th century. https://www.rawpixel.com/image/13978084/image-face-frame-personFree Image from public domain licenseMoon setting over the trees in the morning. Original public domain image from Flickr https://www.rawpixel.com/image/4038851/photo-image-moon-tree-plantFree Image from public domain licenseNicholas Saunderson [Sanderson]. Line engraving by T. Rothwell, 1796, after J. Vanderbank. https://www.rawpixel.com/image/14020413/image-face-person-artFree Image from public domain licenseJohn Freind. Line engraving by G. Vertue, 1730, after M. Dahl, 1725. https://www.rawpixel.com/image/14015626/john-freind-line-engraving-vertue-1730-after-dahl-1725Free Image from public domain license"La Religion", Sculpture by Jean Bonnassieux, Decoration of the Louvre, Paris by Édouard Baldus https://www.rawpixel.com/image/14324496/image-face-hands-personFree Image from public domain licenseJohn Haygarth. Line engraving by W. Cooke, 1827, after J. H. Bell. https://www.rawpixel.com/image/14003902/john-haygarth-line-engraving-cooke-1827-after-bellFree Image from public domain licenseAnatomia uteri humani gravidi tabulis illustrata ... The anatomy of the human gravid uteris exhibited in figures / [William… https://www.rawpixel.com/image/13984953/image-face-frame-personFree Image from public domain licenseUnidentified bearded man, printed in oval style by C Hawkins https://www.rawpixel.com/image/14306932/unidentified-bearded-man-printed-oval-style-hawkinsFree Image from public domain licenseUnidentified bearded man wearing a hat, seated by Frederick Gutekunst https://www.rawpixel.com/image/14308264/unidentified-bearded-man-wearing-hat-seated-frederick-gutekunstFree Image from public domain licenseA man is sitting on a type of rope seat with a brush in one hand and a large bowl in the other. Coloured etching. https://www.rawpixel.com/image/13958577/image-cartoon-face-handFree Image from public domain licensePortrait of a little girl posed on a stone railing by J A Brush https://www.rawpixel.com/image/14307286/portrait-little-girl-posed-stone-railing-brushFree Image from public domain licenseHenri Fouquet. Stipple engraving by A. Tardieu after himself. https://www.rawpixel.com/image/13988313/henri-fouquet-stipple-engraving-tardieu-after-himselfFree Image from public domain license