Illustrations from the book European Butterflies and Moths by William Forsell Kirby (1882), a kaleidoscope of fluttering… https://www.rawpixel.com/image/431463/free-illustration-image-butterfly-retro-vintageFree Image from public domain licenseDahlias by Willem Hekking (I) (1806 –1862). Original from the Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/843203/beautiful-dahlia-flowersFree Image from public domain licensePink Flamingo from Birds of America (1827) by John James Audubon (1785 - 1851 ), etched by Robert Havell (1793 - 1878).… https://www.rawpixel.com/image/277495/pink-flamingoFree Image from public domain licenseHuman Skeleton, Lateral View (Close to the Final Study for Table III But Differs in Detail), (1795–1806) drawing in… https://www.rawpixel.com/image/3820038/illustration-image-art-peopleFree Image from public domain licenseSkull of a cow (1816) by Jean Bernard (1775-1883). Original from the Rijks Museum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481405/vintage-cow-skullFree Image from public domain licenseCampbell's magnolia (Magnolia Campbellii), Flowering plant from Illustrations of Himalayan plants (1855) by W. H. (Walter… https://www.rawpixel.com/image/327879/pink-flowersFree Image from public domain licenseSitting Cat (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466818/free-illustration-image-cat-julie-graag-stampFree Image from public domain licenseLeonardo da Vinci's Vitruvian Man (circa 1492) famous drawing. Original from Wikimedia Commons. Digitally enhanced by… https://www.rawpixel.com/image/3848169/illustration-image-hands-art-circleFree Image from public domain licenseSketch of a cat (1813) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481389/free-illustration-image-cat-sketch-vintageFree Image from public domain licenseSitting cat (1917) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466990/free-illustration-image-cat-julie-graag-art-nouveauFree Image from public domain licenseSkull of a cow (1816) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481422/vintage-cow-skullFree Image from public domain licenseSalon des Cent poster (1896) by Alphonse Maria Mucha. Original from The Public Institution Paris Musées. Digitally… https://www.rawpixel.com/image/2696495/free-illustration-image-mucha-art-nouveau-posterFree Image from public domain licenseDog's head (1920) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466876/free-illustration-image-dog-julie-graag-graagFree Image from public domain licenseThree cats (1916) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466902/free-illustration-image-julie-graag-art-nouveau-paintingFree Image from public domain licenseTwo owls (1921) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466925/free-illustration-image-julie-graag-woodcut-art-nouveauFree Image from public domain licenseSunflower (1919) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466805/free-illustration-image-sunflower-julie-graag-woodcutFree Image from public domain licenseIllustrations from the book of European Butterflies and Moths by William Forsell Kirby (1882), a kaleidoscope of fluttering… https://www.rawpixel.com/image/431473/free-illustration-image-butterfly-vintage-shellFree Image from public domain licenseMadonna (ca. 1895–1896) by Edvard Munch. Original from The Art Institute of Chicago. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/2055579/madonna-edvard-munchFree Image from public domain licenseSitting cat (1815) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481561/free-illustration-image-cat-vintageFree Image from public domain licenseRolled up lying sleeping cat (1825) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by… https://www.rawpixel.com/image/481548/free-illustration-image-cat-vintage-animalsFree Image from public domain licenseThe Tricolor with a French flag themed balloon ascension in Paris, June 6th 1874. Original from Library of Congress.… https://www.rawpixel.com/image/429692/vintage-air-balloon-posterFree Image from public domain licenseLeonardo da Vinci's La Scapigliata (circa 1506–1508) famous painting. Original from Wikimedia Commons. Digitally… https://www.rawpixel.com/image/3848192/illustration-image-face-art-peopleFree Image from public domain licenseIllustrations from the book European Butterflies and Moths by William Forsell Kirby (1882), a kaleidoscope of fluttering… https://www.rawpixel.com/image/431470/free-illustration-image-butterfly-flower-shellFree Image from public domain licenseIllustrations from the book European Butterflies and Moths by William Forsell Kirby (1882), a kaleidoscope of fluttering… https://www.rawpixel.com/image/431483/free-illustration-image-butterfly-lithograph-shellFree Image from public domain licenseSitting cat (1917) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466833/free-illustration-image-cat-julie-graag-art-nouveauFree Image from public domain licenseIllustration of a giraffe from Dictionnaire des Sciences Naturelles by Pierre Jean Francois Turpin (1840). Digitally… https://www.rawpixel.com/image/431449/giraffe-drawingFree Image from public domain licenseAncient of Days Setting a Compass to the Earth (1794) illustration from Europe: a Prophecy by William Blake (1752-1827).… https://www.rawpixel.com/image/328175/free-illustration-image-god-william-blake-musicFree Image from public domain licensePortrait of an unknown woman Sketch design for portrait in stained glass (1916) print in high resolution by Richard Roland… https://www.rawpixel.com/image/3120861/illustration-image-art-peopleFree Image from public domain licenseView of the Eiffel Tower in Paris (ca. 1891–1941) drawing in high resolution by Leo Gestel. Original from The… https://www.rawpixel.com/image/3044492/free-illustration-image-vintage-sketch-cityFree Image from public domain licenseLouisiana Heron from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University… https://www.rawpixel.com/image/277324/louisiana-heron-birdFree Image from public domain licenseLeonardo da Vinci's Self-portrait (1512) famous painting. Original from Wikimedia Commons. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/3849742/illustration-image-art-peopleFree Image from public domain licenseHuman Skeleton, Anterior View (Finished Study for Table I), (1795–1806) drawing in high resolution by George Stubbs.… https://www.rawpixel.com/image/3820049/illustration-image-art-peopleFree Image from public domain licenseFlower vase (ca. 1891–1941) drawing in high resolution by Leo Gestel. Original from The Rijksmuseum. Digitally… https://www.rawpixel.com/image/3044812/free-illustration-image-flower-black-and-white-sketchFree Image from public domain licenseCoracias Garrulus Lin (European Roller) by Magnus Von Wright (1836), an isolated portrait of an European roller. Digitally… https://www.rawpixel.com/image/431446/free-illustration-image-bird-vintage-birds-drawingFree Image from public domain licenseChrysanthemums by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466921/free-illustration-image-julie-graag-fashion-art-nouveauFree Image from public domain licenseDecember Cat (1917) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466881/free-illustration-image-cat-julie-graag-art-nouveauFree Image from public domain licenseSpider in a web (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466978/free-illustration-image-spider-julie-graag-graagFree Image from public domain licenseEast Indian Cherry (1916) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466857/free-illustration-image-julie-graag-art-nouveau-indianFree Image from public domain licensePlum (Prunier de Sainte-Catherine) from Traité des Arbres et Arbustes que l’on cultive en France en pleine… https://www.rawpixel.com/image/569135/ripe-plums-branchFree Image from public domain licenseIllustrations from the book European Butterflies and Moths by William Forsell Kirby (1882), a kaleidoscope of fluttering… https://www.rawpixel.com/image/431480/free-illustration-image-butterfly-vintage-flowersFree Image from public domain licenseColourful and surreal illustrations of fishes found in Moluccas (Indonesia) and the East Indies by Louis Renard (1678 -1746)… https://www.rawpixel.com/image/261047/colorful-fishesFree Image from public domain licenseSketch of a cat (1812) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481515/free-illustration-image-cat-animals-drawingFree Image from public domain licenseSitting cat (1916) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466849/free-illustration-image-cat-julie-graag-woodcutFree Image from public domain licenseStudies of wasps by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466779/free-illustration-image-bee-honey-julie-graagFree Image from public domain licenseA waxing cat (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466864/free-illustration-image-cat-julie-graag-blackFree Image from public domain licenseAlpine buckthorn (Rhamnus alpinus) from Traité des Arbres et Arbustes que l’on cultive en France en pleine… https://www.rawpixel.com/image/568331/alpine-plantsFree Image from public domain licenseRambler Rose (Rosa multiflora) from Traité des Arbres et Arbustes que l’on cultive en France en pleine terre… https://www.rawpixel.com/image/569305/pink-rambler-rosesFree Image from public domain licenseEast Indian Cherry (1919) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466821/free-illustration-image-julie-graag-indian-art-nouveauFree Image from public domain licenseCommon American Swan from Birds of America (1827) by John James Audubon (1785 - 1851), etched by Robert Havell (1793 -… https://www.rawpixel.com/image/277241/common-american-swanFree Image from public domain licenseFeather by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481331/free-illustration-image-feather-wings-sketchFree Image from public domain licenseRolled up lying, sleeping cat by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481604/free-illustration-image-cat-vintageFree Image from public domain licenseSnowy Owl from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… https://www.rawpixel.com/image/277569/snowy-owlFree Image from public domain licenseJune (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466993/free-illustration-image-julie-graag-art-nouveau-public-domain-graagFree Image from public domain licensePortrait of a Woman (1910) by Egon Schiele. Original female line art drawing from The MET museum. Digitally enhanced by… https://www.rawpixel.com/image/2680516/free-illustration-image-art-line-egon-schieleFree Image from public domain licenseNaked lady. Crouching Nude in Shoes and Black Stockings, Back View (1912) by Egon Schiele. Original female painting from The… https://www.rawpixel.com/image/2682871/free-illustration-image-egon-schiele-sketch-line-artFree Image from public domain licenseSleeping Cat (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466950/free-illustration-image-cat-julie-graag-art-nouveauFree Image from public domain licenseBitter sweet oranges on a branch (Citrus Bigaradia Sinensis) from Traité des Arbres et Arbustes que l’on… https://www.rawpixel.com/image/569396/orange-tree-branchFree Image from public domain licenseWhite pine, Pinus strobusfrom Traité des Arbres et Arbustes que l’on cultive en France en pleine terre… https://www.rawpixel.com/image/569043/white-pine-treeFree Image from public domain licenseLying cat (1811) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481640/free-illustration-image-cat-vintageFree Image from public domain licenseDead bird (1919) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466949/free-illustration-image-bird-art-nouveau-vintageFree Image from public domain licenseAmerican White Pelican from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277168/american-white-pelicanFree Image from public domain licenseNaked woman showing off her bum, vintage nude illustration. Caresse: moi danc, chéri by Auguste Rodin. Original from… https://www.rawpixel.com/image/2522015/free-illustration-image-woman-watercolor-bodyFree Image from public domain licenseSouthern magnolia (magnolia grandiflora) from Traité des Arbres et Arbustes que l’oncultive en France en pleine… https://www.rawpixel.com/image/568327/white-southern-magnoliaFree Image from public domain licenseBitter orange (Citrus Bigaradia violacea) from Traité des Arbres et Arbustes que l’on cultive en France en… https://www.rawpixel.com/image/569504/orange-tree-branchFree Image from public domain licenseThree Horses (ca. 1925–1930) drawing in high resolution by Leo Gestel. Original from The Rijksmuseum. Digitally… https://www.rawpixel.com/image/3044799/free-illustration-image-black-and-white-horse-vintage-sketchFree Image from public domain licenseHead of a calico cat with closed eyes (1819) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced… https://www.rawpixel.com/image/481500/free-illustration-image-cat-jean-bernard-petFree Image from public domain licenseLeonardo da Vinci's Studies of the Foetus in the Womb (circa 1510 -1513) famous painting. Original from Wikimedia Commons.… https://www.rawpixel.com/image/3848275/illustration-image-art-vintageFree Image from public domain licenseSperm whale (Physeter macrocephalus) from Natural history of the cetaceans and other marine mammals of the western coast of… https://www.rawpixel.com/image/328230/free-illustration-image-whale-sperm-fishFree Image from public domain licenseDecember cat(1917) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/467064/free-illustration-image-cat-julie-graag-frameFree Image from public domain licenseHead of a cow by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481478/free-illustration-image-cow-animalsFree Image from public domain licensePopular Lectures on Human Nature, a book cover illustration by an unknown artist referencing Prof. W.G Alexander. Original… https://www.rawpixel.com/image/429751/free-illustration-image-brain-book-vintageFree Image from public domain licenseHead of a calico cat with open eyes (1819) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by… https://www.rawpixel.com/image/481409/free-illustration-image-cat-animals-vintageFree Image from public domain licenseBald tree (1919) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466780/free-illustration-image-julie-graag-woodcut-art-nouveauFree Image from public domain licenseA Prancing Horse, Facing Right (ca. 1790) drawing in high resolution by George Stubbs. Original from The Yale University Art… https://www.rawpixel.com/image/3819107/illustration-image-art-vintageFree Image from public domain licenseFerns (1920) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466991/free-illustration-image-julie-graag-eucalyptus-woodcutFree Image from public domain licenseFarm in the snow (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466969/free-illustration-image-julie-graag-winter-snowFree Image from public domain licensePeace Dove (ca. 1891–1941) drawing in high resolution by Leo Gestel. Original from The Rijksmuseum. Digitally enhanced… https://www.rawpixel.com/image/3044486/free-illustration-image-bird-leo-modern-artFree Image from public domain licenseRose bush (1919) by JJulie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/467071/free-illustration-image-julie-graag-rose-woodcutFree Image from public domain licenseSeptember (1917) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. https://www.rawpixel.com/image/467024/free-illustration-image-mushroom-julie-graag-stampFree Image from public domain licensePersian lilac (lilac persica) from Traité des Arbres et Arbustes que l’on cultive en France en pleine terre… https://www.rawpixel.com/image/568193/blooming-persian-lilacFree Image from public domain licenseCover Design for Louis Couperus' Psyche (1898) by Jan Toorop. Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/2677126/free-illustration-image-art-nouveau-black-and-white-womanFree Image from public domain licenseDesign for Herbarium book cover by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/467037/free-illustration-image-book-cover-vintage-herbariumFree Image from public domain licenseGrasshopper (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466853/free-illustration-image-julie-graag-insects-woodcutFree Image from public domain licenseBuddha on the Borobudur (ca. 1891–1941) drawing in high resolution by Leo Gestel. Original from The Rijksmuseum.… https://www.rawpixel.com/image/3043955/free-illustration-image-god-buddha-vintageFree Image from public domain licenseHuman Figure, Lateral View (Finished study for an unpublished table, representing the last stage in the dissection)… https://www.rawpixel.com/image/3820045/illustration-image-art-peopleFree Image from public domain licenseDog (1917) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466931/free-illustration-image-dog-julie-graag-animalsFree Image from public domain licenseStudies of eyes (1630–1640) by Jusepe de Ribera. Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/843265/human-eyes-sketchFree Image from public domain licenseFive studies of Cats (1812) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481633/free-illustration-image-animals-vintage-catFree Image from public domain licenseRose bush (1919) by JJulie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/467035/free-illustration-image-julie-graag-orange-art-nouveauFree Image from public domain licenseRoseate Spoonbill from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277295/free-illustration-image-audubon-birds-americaFree Image from public domain licenseArtichoke by Jean Bernard (1775-1883). Original from the Rijks Museum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481402/free-illustration-image-vegetable-artichoke-fruitFree Image from public domain licenseIndian tobacco (Lobelia inflata) from Illustrations of Himalayan plants (1855) by W. H. (Walter Hood) Fitch (1817-1892). https://www.rawpixel.com/image/327900/free-illustration-image-garden-vintage-flowers-botanyFree Image from public domain licenseThree Grecian heads from An illustration of the Egyptian, Grecian and Roman costumes by Thomas Baxter… https://www.rawpixel.com/image/420963/free-illustration-image-greek-mythology-romansFree Image from public domain licenseThe Tricolor balloon ascension in Paris, June 6th 1874. Original from Library of Congress. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/429690/free-illustration-image-balloon-hot-air-parisFree Image from public domain licenseShell (1921) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466804/free-illustration-image-shell-julie-graag-seaFree Image from public domain licenseSketch of a cat (1808) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481493/free-illustration-image-cat-vintageFree Image from public domain licenseRooster (1901) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/467070/free-illustration-image-rooster-chicken-julie-graagFree Image from public domain licenseCreeping willow (Salix arenaria) from Traité des Arbres et Arbustes que l’on cultive en France en pleine terre… https://www.rawpixel.com/image/568328/creeping-willow-plantFree Image from public domain licenseSitting cat (1819) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481641/free-illustration-image-cat-vintage-animalsFree Image from public domain licenseSketch of a cat (1813) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481459/free-illustration-image-cat-face-vintageFree Image from public domain license