Aerostatic magazine (1878) Rivista aerostatica by Augusto Grossi. Original public domain image from the Library of Congress.… https://www.rawpixel.com/image/8627229/image-art-vintage-balloonFree Image from public domain licenseRoyal Naval Hospital, Haslar: ward for open-air treatment. Oil painting by Godfrey Jervis Gordon ("Jan Gordon"). https://www.rawpixel.com/image/13964364/image-plant-grass-artFree Image from public domain licenseA Flemish Kermis with a Performance of the Farce ‘Een cluyte van Plaeyerwater’ (c. 1570) by Peeter Baltens https://www.rawpixel.com/image/13742273/image-background-dog-personFree Image from public domain licenseVarious birds in flight, including eagles, a heron, a pigeon and ducks. Etching after F. Barlow. https://www.rawpixel.com/image/13954254/image-art-pattern-animalFree Image from public domain licenseView of Duurstede Castle at Wijk bij Duurstede by Jan van Goyen https://www.rawpixel.com/image/14264438/view-duurstede-castle-wijk-bij-duurstede-jan-van-goyenFree Image from public domain licenseSpace stations & rockets background. Remixed by rawpixel. https://www.rawpixel.com/image/10390166/image-background-person-spaceView licenseSarus cranes flying background, traditional Japanese illustration. Remixed by rawpixel. https://www.rawpixel.com/image/11763094/image-background-moon-artView licenseOntvoering van Ganymedes (1616 - 1647) by Nicolas Mignard, Annibale Carracci, Annibale Carracci, François Langlois and… https://www.rawpixel.com/image/13785840/image-paper-angel-cartoonFree Image from public domain licenseTwee veelvlakken met een bol als uitgangspunt (1568) by Jost Amman, Wenzel Jamnitzer and Wenzel Jamnitzer https://www.rawpixel.com/image/13750097/image-paper-art-patternFree Image from public domain licenseFestival in de Haarlemmer hout (1832) by Hendrik Gerrit ten Cate https://www.rawpixel.com/image/13786625/festival-haarlemmer-hout-1832-hendrik-gerrit-ten-cateFree Image from public domain licenseLike a broken winged bird, Morancy came limping and flapping back to his own people (1918) by George Hand Wright https://www.rawpixel.com/image/11768495/image-face-person-artFree Image from public domain licenseA hot-air balloon leaves the ground in driving rain. Coloured wood engraving. https://www.rawpixel.com/image/14003779/hot-air-balloon-leaves-the-ground-driving-rain-coloured-wood-engravingFree Image from public domain licenseRuïne met bogen en een trap, mogelijk het Colosseum (1693 - 1717) by Joannes van Doetechum I, Lucas van Doetechum… https://www.rawpixel.com/image/13768153/image-paper-cartoon-personFree Image from public domain licensePier no. 1, filling a foundation caisson with compressed air by Louis Émile Durandelle https://www.rawpixel.com/image/14281431/image-person-public-domain-factoryFree Image from public domain licenseDe Baak, een badplaats aan het IJ (1803) by Jurriaan Andriessen https://www.rawpixel.com/image/13780984/baak-een-badplaats-aan-het-1803-jurriaan-andriessenFree Image from public domain licenseColosseum te Rome (1748 - 1778) by Giovanni Battista Piranesi and Giovanni Battista Piranesi https://www.rawpixel.com/image/13764990/image-paper-church-artFree Image from public domain licenseColosseum te Rome (1748 - 1778) by Giovanni Battista Piranesi and Giovanni Battista Piranesi https://www.rawpixel.com/image/13777664/image-paper-person-churchFree Image from public domain license