Promotional poster for Giacomo Puccini's opera "Turandot", on 25 April 1926. See here for references. https://www.rawpixel.com/image/9976680/image-face-person-artFree Image from public domain licenseKing George IV when Prince of Wales as Colonel of the tenth Light Dragoons. Photogravure, 1905, after W. Beechey. https://www.rawpixel.com/image/13973381/image-face-person-artFree Image from public domain licenseThe head of a man with goitre. Etching by Jusepe de Ribera, 1622. https://www.rawpixel.com/image/14021445/the-head-man-with-goitre-etching-jusepe-ribera-1622Free Image from public domain licenseA man, designated as the painter Giovanni Antonio Licinio, il Pordenone. Photograph by Gustav Schauer after an engraving. https://www.rawpixel.com/image/13996686/image-face-person-artFree Image from public domain licenseGiuseppe Gazzeri. Lithograph by L. Fiorucci after C. E. Liverati. https://www.rawpixel.com/image/13974631/giuseppe-gazzeri-lithograph-fiorucci-after-liveratiFree Image from public domain licenseJohn V. Wright by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14317418/john-wright-james-earle-mcclees-and-julian-vannersonFree Image from public domain licensePortret van een man (1696 - 1727) by Matthijs Pool and Rembrandt van Rijn https://www.rawpixel.com/image/13781425/portret-van-een-man-1696-1727-matthijs-pool-and-rembrandt-van-rijnFree Image from public domain licenseRoman Karpwitch by Prince Roland Napoleon Bonaparte and G Roche https://www.rawpixel.com/image/14309377/roman-karpwitch-prince-roland-napoleon-bonaparte-and-rocheFree Image from public domain licenseJohann Theodor Eller. Line engraving by J.F. Kauke after A. Pesne. https://www.rawpixel.com/image/13999813/johann-theodor-eller-line-engraving-jf-kauke-after-pesneFree Image from public domain licenseKristine Persdatter by Prince Roland Napoleon Bonaparte and G Roche https://www.rawpixel.com/image/14310000/kristine-persdatter-prince-roland-napoleon-bonaparte-and-rocheFree Image from public domain licensePortret van een onbekende jonge vrouw (1893 - 1943) by Jean Louis Boussingault https://www.rawpixel.com/image/13767940/portret-van-een-onbekende-jonge-vrouw-1893-1943-jean-louis-boussingaultFree Image from public domain licenseA woman, with bulging eyes, looking upwards. Photograph, 1864. https://www.rawpixel.com/image/14016859/woman-with-bulging-eyes-looking-upwards-photograph-1864Free Image from public domain licenseRichard Warren. Mezzotint by J. Jones, 1792, after T. Gainsborough. https://www.rawpixel.com/image/14001826/richard-warren-mezzotint-jones-1792-after-gainsboroughFree Image from public domain licenseCaligula, Emperor of Rome. Line engraving, 16--, after A. Sadeler after Titian. https://www.rawpixel.com/image/14018973/caligula-emperor-rome-line-engraving-16-after-sadeler-after-titianFree Image from public domain licenseSaint Francis of Assisi. Engraving by M.G. Aubert, 1724, after G. Reni. https://www.rawpixel.com/image/13988433/saint-francis-assisi-engraving-mg-aubert-1724-after-reniFree Image from public domain licenseCharles Étienne Bonnet, the Swiss naturalist and philosopher: profile. Drawing, c. 1794. https://www.rawpixel.com/image/13999439/image-paper-cartoon-faceFree Image from public domain licenseJohn A. Bingham by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14318553/john-bingham-james-earle-mcclees-and-julian-vannersonFree Image from public domain licenseMartin Heinrich Karl Lichtenstein. Stipple engraving by R. Cooper, 1812. https://www.rawpixel.com/image/13983528/martin-heinrich-karl-lichtenstein-stipple-engraving-cooper-1812Free Image from public domain licenseA woman, previously designated as Elizabeth Garrett Anderson or Isabel Thorne. Oil painting. https://www.rawpixel.com/image/13968455/image-face-person-artFree Image from public domain license"Desire" from le Brun, Heads. Representing the various passions of the soul..., circa 1760 https://www.rawpixel.com/image/13972366/image-cartoon-face-personFree Image from public domain licenseHeads. Representing the various passions of the soul; as they are expressed in the human countenance / [Charles Le Brun]. https://www.rawpixel.com/image/13983255/image-paper-cartoon-faceFree Image from public domain licenseSaint Francis Xavier. Engraving by S.A. Bolswert after Sir P.P. Rubens. https://www.rawpixel.com/image/13992947/saint-francis-xavier-engraving-sa-bolswert-after-sir-pp-rubensFree Image from public domain licenseSpider close up in nature, animal photography. Free public domain CC0 image. https://www.rawpixel.com/image/6018063/photo-image-background-light-public-domainFree Image from public domain licenseCatherine II in lavish dress, seated in an armchair; crown on a table in the background. Stipple print by C. Watson after A.… https://www.rawpixel.com/image/13979247/image-background-face-personFree Image from public domain licenseA uniformed soldier from the army medical staff. Watercolour, 1886. https://www.rawpixel.com/image/13967855/uniformed-soldier-from-the-army-medical-staff-watercolour-1886Free Image from public domain licensePortret van Dr. P.J.H. Cuypers (1917) by Bernard Willem Wierink https://www.rawpixel.com/image/13738030/portret-van-dr-pjh-cuypers-1917-bernard-willem-wierinkFree Image from public domain licenseEdward Jenner. Pencil drawing attributed to H. Edridge, 1821. https://www.rawpixel.com/image/13987445/edward-jenner-pencil-drawing-attributed-edridge-1821Free Image from public domain licensePortrait of Coenraad van Heemskerck, Count of the Holy Roman Empire, Lord of Achttienhoven and Den Bosch (1750) by Mattheus… https://www.rawpixel.com/image/13742973/image-dog-face-personFree Image from public domain licenseFree person looking towards scenery image, public domain cityscape CC0 photo. https://www.rawpixel.com/image/5908687/image-light-public-domain-personFree Image from public domain licenseMr. Blake in the character of Monsieur le médecin. Mezzotint by J. McArdell after himself. https://www.rawpixel.com/image/14010225/image-cartoon-face-personFree Image from public domain licenseJohn Locke. Mezzotint by J. Smith, 1721, after Sir G. Kneller. https://www.rawpixel.com/image/13998284/john-locke-mezzotint-smith-1721-after-sir-knellerFree Image from public domain licensePortret kunstenaar Carlo Cignani (1789) by Carlo Lasinio and Labrelis https://www.rawpixel.com/image/13773857/portret-kunstenaar-carlo-cignani-1789-carlo-lasinio-and-labrelisFree Image from public domain licenseFabel van de vrouw met een civetkat (1608) by Aegidius Sadeler II, Aegidius Sadeler II and Aegidius Sadeler II https://www.rawpixel.com/image/13783663/image-paper-cartoon-faceFree Image from public domain licensePortrait of Carel Rabenhaupt, Lieutenant-General (c. 1670) by anonymous https://www.rawpixel.com/image/13743901/portrait-carel-rabenhaupt-lieutenant-general-c-1670-anonymousFree Image from public domain licenseSolomon Foot by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14317496/solomon-foot-james-earle-mcclees-and-julian-vannersonFree Image from public domain licenseCarolus Linnaeus. Line engraving by C.C. Bervic, 1779, after A. Roslin, 1775. https://www.rawpixel.com/image/14020785/carolus-linnaeus-line-engraving-cc-bervic-1779-after-roslin-1775Free Image from public domain licenseJohn W. Stevenson by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14317353/john-stevenson-james-earle-mcclees-and-julian-vannersonFree Image from public domain licenseAndrea Cesalpino. Line engraving by F. Allegrini, 1765, after G. Zocchi. https://www.rawpixel.com/image/14010959/andrea-cesalpino-line-engraving-allegrini-1765-after-zocchiFree Image from public domain licenseA leaping frog startles a huntsman, causing him to tread on his dog's tail and scare away the chamois buck which he was… https://www.rawpixel.com/image/13969744/image-dog-cartoon-personFree Image from public domain licenseWilliam D. Bishop by James Earle McClees and Julian Vannerson https://www.rawpixel.com/image/14316786/william-bishop-james-earle-mcclees-and-julian-vannersonFree Image from public domain licenseFree closeup on Paris Eiffel Tower in black and white photo, public domain building CC0 image. https://www.rawpixel.com/image/5920996/photo-image-light-public-domain-shapeFree Image from public domain license