Adam Walker, a natural philosopher, performing scientific experiments. Coloured etching after J. Gillray, 1796. https://www.rawpixel.com/image/13951440/image-cartoon-face-personFree Image from public domain licenseRemains of a room belonging to the Praetorian Fort at Hadrian's Villa, Tivoli, from Views of Rome by Giovanni Battista… https://www.rawpixel.com/image/8979589/image-paper-person-artFree Image from public domain licenseAdam Walker, a natural philosopher, performing scientific experiments. Coloured etching after J. Gillray, 1796. https://www.rawpixel.com/image/13969726/image-cartoon-face-frameFree Image from public domain licenseDiogenes Seeking an Honest Man by Giovanni Benedetto Castiglione https://www.rawpixel.com/image/8972116/diogenes-seeking-honest-man-giovanni-benedetto-castiglioneFree Image from public domain licenseAiropaidia : containing the narrative of a balloon excursion from Chester, the eighth of September, 1785, taken from minutes… https://www.rawpixel.com/image/9199178/image-steam-vintage-booksFree Image from public domain licenseLe Déjeuner de Voltaire à Ferney or Le Souper des Philosophes by Jean Huber https://www.rawpixel.com/image/8978645/dejeuner-voltaire-ferney-souper-des-philosophes-jean-huberFree Image from public domain licenseThe Little Philosopher by Jean-Pierre Norblin de la Gourdaine https://www.rawpixel.com/image/8998062/the-little-philosopher-jean-pierre-norblin-gourdaineFree Image from public domain licenseDemocritus laughing and Heraclitus weeping, with a globe between them. Etching by R. Gaywood after J. van Vliet after… https://www.rawpixel.com/image/13969920/image-cartoon-face-personFree Image from public domain licenseDemocritus laughing and Heraclitus weeping, with a globe between them. Etching by R. Gaywood after J. van Vliet after… https://www.rawpixel.com/image/13969622/image-cartoon-face-personFree Image from public domain licenseEmblem representing the path to the philosopher's stone in alchemy. Etching by Defehrt, 1768, after L.-J. Goussier, after… https://www.rawpixel.com/image/13978902/image-dog-cartoon-faceFree Image from public domain licenseAn archangel revealing the physical nature of the universe to a group of natural philosophers and mathematicians. Etching by… https://www.rawpixel.com/image/13981037/image-paper-cartoon-personFree Image from public domain licenseA philosopher in his study, reading a book containing a print of a skeleton. Etching by J.A. von Prenner, 1728, after C.… https://www.rawpixel.com/image/13996212/image-cartoon-frame-personFree Image from public domain licenseZittende oude man (1747 - 1773) by Charles Phillips and Rembrandt van Rijn https://www.rawpixel.com/image/13780151/zittende-oude-man-1747-1773-charles-phillips-and-rembrandt-van-rijnFree Image from public domain licenseA woman representing Wisdom giving to a philosopher (Aristotle) the key to the treasure-house of Reason, to distinguish man… https://www.rawpixel.com/image/14019801/image-cartoon-face-personFree Image from public domain licensePlato discussing philosophical matters with others in the garden of the Academia. Etching by Salvator Rosa. https://www.rawpixel.com/image/13994534/image-rosa-cartoon-faceFree Image from public domain licenseHercules holds up the world between two philosophers representing astronomy and mathematics. Etching by P. Aquila after G.… https://www.rawpixel.com/image/13992403/image-cartoon-person-artFree Image from public domain licenseDe omgekeerde wereld (1574 - 1637) by Crispijn van de Passe I, Crispijn van de Passe I and Crispijn van de Passe I https://www.rawpixel.com/image/13764651/image-paper-cartoon-faceFree Image from public domain licenseA philosopher in his study, reading a book containing a print of a skeleton. Etching by J.A. von Prenner, 1728, after C.… https://www.rawpixel.com/image/13974022/image-cartoon-person-booksFree Image from public domain licensePhilosopher, plate three from One Death, Part II by Max Klinger https://www.rawpixel.com/image/8974806/philosopher-plate-three-from-one-death-part-max-klingerFree Image from public domain licenseA philosopher seated at a table covered with large folio volumes and a globe; right, a winding staircase. Etching by L.… https://www.rawpixel.com/image/13988337/image-person-art-manFree Image from public domain licenseA seething mass of people driven by a multitude of different wills; representing the levelling of life by death. Etching by… https://www.rawpixel.com/image/13988820/image-dog-paper-cartoonFree Image from public domain licenseJames Hutton (left) and Joseph Black (right), natural philosophers, talking together. Etching and aquatint by J. Kay, 1787. https://www.rawpixel.com/image/14020923/image-cartoon-face-personFree Image from public domain licenseA young woman, seated outdoors, with an armillary sphere or similar instrument, looking pensive. Colour etching by E.… https://www.rawpixel.com/image/14017960/image-cartoon-face-personFree Image from public domain licenseTwo philosophers engaged in conversation. Etching by A. Pond, c. 1740, after A. Carracci. https://www.rawpixel.com/image/14018826/image-cartoon-face-personFree Image from public domain licensePlato discussing philosophical matters with others in the garden of the Academia. Etching by Salvator Rosa. https://www.rawpixel.com/image/13976916/image-rosa-face-plantFree Image from public domain licenseA philosopher and virtuoso seated in an armchair: dissatisfied with his accomplishments, he points to the need for charity… https://www.rawpixel.com/image/14020180/image-face-person-artFree Image from public domain licenseAn Egyptian philosopher teaching his pupil the art of iconology. Etching. https://www.rawpixel.com/image/13974052/egyptian-philosopher-teaching-his-pupil-the-art-iconology-etchingFree Image from public domain licenseBlad met uiteenlopende encyclopedische voorstellingen (1784) by Johann Georg Penzel and Johann Georg Penzel https://www.rawpixel.com/image/13777836/image-paper-cartoon-faceFree Image from public domain license