A Rose and Five Insects (1618) attributed to Christoffel van den Berghe. Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Cliffs at Pourville (1882) by Claude Monet. Original from the National Gallery of Art. Digitally enhanced by rawpixel. Free Image from public domain license 
Twentieth Century Transportation, a chromolithograph by E.S Yate. Original from Library of Congress. Digitally enhanced by… Free Image from public domain license 
Cats by Thomas Hunter. Original from Library of Congress. Digitally enhanced by rawpixel. Free Image from public domain license 
Beautiful photomechanical prints of Lotus Flowers (1887–1897) by Ogawa Kazumasa. Original from The Rijksmuseum.… Free Image from public domain license 
Woman with a Parasol, Madame Monet and Her Son (1875) by Claude Monet. Original from the National Gallery of Art. Digitally… Free Image from public domain license 
The Prize Piggies (Christmas and New Year card) (1891) lithographed by L. Prang & Co. Free Image from public domain license 
A Perch of Birds (1880) by Hector Giacomelli (1822-1904). Digitally enhanced from our own original plate. Free Image from public domain license