A balloon ascent by the Montgolfier brothers at Versailles in 1783 watched by a huge crowd. Coloured etching. https://www.rawpixel.com/image/13966275/image-person-art-skyFree Image from public domain licenseDrop-front desk (secrétaire à abattant or secrétaire en cabinet) https://www.rawpixel.com/image/12850749/drop-front-desk-secretaire-abattant-secretaire-cabinetFree Image from public domain licenseBritish inventors, politicians and military men, gathered in a room at Buckingham Palace. Engraving by C.G. Lewis, 1863… https://www.rawpixel.com/image/13986687/image-cat-person-artFree Image from public domain licenseCelebrated psychologists, gathered around a table. Lithograph by G.B. Black after J.E. Mayall, 1851. https://www.rawpixel.com/image/14005907/image-face-people-booksFree Image from public domain licenseBritish inventors, politicians and military men: a key to the identities of the sitters. Engraving by C.G. Lewis, 1863… https://www.rawpixel.com/image/13997233/image-dog-paper-cartoonFree Image from public domain licenseThree giants, the tallest identified as Charles Byrne and the others as twins, and six spectators including an unidentified… https://www.rawpixel.com/image/13979223/image-cartoon-face-personFree Image from public domain license