Threatened swan (1650) by Jan Asselijn. Original public domain image from the Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/8627622/image-watercolor-art-vintageFree Image from public domain licenseNeville Chamberlain (1938) oil painting by Samuel Johnson Woolf. Original public domain image from The Smithsonian… https://www.rawpixel.com/image/10546966/image-face-person-artFree Image from public domain licenseAbraham Lincoln portrait in the Lincoln room, Blair House, located across from the White House, Washington, D.C. Original… https://www.rawpixel.com/image/421696/abraham-lincolnFree Image from public domain licenseMrs. Daniel Hubbard (Mary Greene) by John Singleton Copley https://www.rawpixel.com/image/8939114/mrs-daniel-hubbard-mary-greene-john-singleton-copleyFree Image from public domain licenseThe Conference of the Gauls at Reims (1600 - 1613) by Otto van Veen https://www.rawpixel.com/image/13741890/the-conference-the-gauls-reims-1600-1613-otto-van-veenFree Image from public domain license"Painting from The Saturday Evening Post."; "Additional copies may be obtained upon request from the Division of Public… https://www.rawpixel.com/image/9976096/image-faces-vintage-illustrationsFree Image from public domain licenseCzechoslovakian Army Entering Vladivostok, Siberia, in 1918 by George Benjamin Luks https://www.rawpixel.com/image/11932994/image-background-people-artFree Image from public domain licensePortrait of Hugh Montgomerie, Later Twelfth Earl of Eglinton by John Singleton Copley https://www.rawpixel.com/image/11932924/image-person-art-vintageFree Image from public domain licenseA swan protects her nest against a dog. The scene was later turned into a political allegory by refering to the swan as… https://www.rawpixel.com/image/7665920/image-art-vintage-public-domainFree Image from public domain licenseCollegium Politicum.From Ludvig Holberg's The Political Pitcher, Act 1, Scene 2. by Wilhelm Marstrand https://www.rawpixel.com/image/8921813/image-face-art-vintageFree Image from public domain licensePrince William I nursed by his Wife Charlotte de Bourbon after the Abortive Attempt on his Life by Jean Jaurequi in Antwerp… https://www.rawpixel.com/image/13733207/image-dog-face-personFree Image from public domain licenseAllegory on the French Invasion of 1672 (1672) by Johannes van Wijckersloot https://www.rawpixel.com/image/13731429/allegory-the-french-invasion-1672-1672-johannes-van-wijckerslootFree Image from public domain licenseVisit of the Prince of Wales, President Buchanan, and Dignitaries to the Tomb of Washington at Mount Vernon, October 1860… https://www.rawpixel.com/image/8846956/image-vintage-public-domain-paintingFree Image from public domain licenseCharles Maurice de Talleyrand Périgord (1754–1838), Prince de Talleyrand by Pierre Paul Prud'hon https://www.rawpixel.com/image/9613314/image-napoleon-louis-philippe-1806Free Image from public domain license