Fahrrader 1 (1894) from the German series, Meyers Konversations Lexikon, a black and white lithograph of different types of… Free Image from public domain license 
The Tricolor balloon ascension in Paris, June 6th 1874. Original from Library of Congress. Digitally enhanced by rawpixel. Free Image from public domain license 
Dungeness crab illustration from Résultats des Campagnes Scientifiques by Albert I, Prince of Monaco… Free Image from public domain license 
Bouquet in a Chinese Vase (1912—1914) by Odilon Redon. Original from The MET museum. Digitally enhanced by rawpixel. Free Image from public domain license 
Shrimp illustration from Résultats des Campagnes Scientifiques by Albert I, Prince of Monaco (1848–1922).… Free Image from public domain license 
Squid illustration from Résultats des Campagnes Scientifiques by Albert I, Prince of Monaco (1848–1922).… Free Image from public domain license 
Toco toucan from Histoire Naturelle des Oiseaux de Paradis et Des Rolliers (1806) by Jacques Barraband (1767-1809). Original… Free Image from public domain license 
Skull of a cow (1816) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Toucan (Ramphastos) illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from our own 1892 edition of… Free Image from public domain license 
Kanazawa Oki Nami Ura by Katsushika Hokusai (1760-1849) a traditional Japanese Ukyio-e style illustration of extreme waves… Free Image from public domain license 
Antique plant drawn by Pierre-Joseph Redouté (1759–1840 ). Original from Biodiversity Heritage Library.… Free Image from public domain license 
Flowers in a vase (1688-1698) by Johan Teyler (1648-1709). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Octopuses illustrated by Edme François Jomard for Description de l'Égypte Histoire Naturelle (1809-1828).… Free Image from public domain license 
