John Adams, 2nd president of the United States (1864). Original from the Library of Congress. https://www.rawpixel.com/image/7689635/image-art-public-domain-peopleFree Image from public domain licenseA lithograph illustration of a ship and interiors by Peter Duval. Original from Library of Congress. Digitally enhanced by… https://www.rawpixel.com/image/429748/free-illustration-image-nautical-ship-sailingFree Image from public domain licenseComposite Ballon by Peter Duval. Original from Library of Congress. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/429720/free-illustration-image-ship-science-vintageFree Image from public domain licenseThomas Jefferson, 3rd President of the United States (1846) by Albert Newsam. Original from the Library of Congress. https://www.rawpixel.com/image/7690926/image-art-public-domain-peopleFree Image from public domain license