Arcadian Landscape with Three Figures at a Lake by Johann Christian Reinhart https://www.rawpixel.com/image/9330061/arcadian-landscape-with-three-figures-lakeFree Image from public domain licenseHeliactis bellis (Thompson) = Cereus pedunculatus (Pennant, 1777)Mesacmaea stella [sic] (Andres) = Mesacmaea stellata… https://www.rawpixel.com/image/7666189/image-art-vintage-public-domainFree Image from public domain licenseDistinguished British men of science 1807-1808 assembled in the library of the Royal Institution, London. Mezzotint by W.… https://www.rawpixel.com/image/13975701/image-person-art-clothingFree Image from public domain licenseDistinguished British men of science 1807-1808 assembled in the library of the Royal Institution, London. Mezzotint by W.… https://www.rawpixel.com/image/13981199/image-person-art-clothingFree Image from public domain licenseThe distinguished men of science 1807-8: a key to the identities of the sitters. Photograph of engraving by W. Walker, 1862… https://www.rawpixel.com/image/14011458/image-cartoon-face-personFree Image from public domain license