Nude child's body (1859) by Herman Löwenstam. Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Studies of eyes (1630–1640) by Jusepe de Ribera. Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
The Three Graces-Painting of the Lord Ward Gallery (1862) from Gazette Des Beaux-Arts, a French art review. Digitally… Free Image from public domain license 
Drawing of Raphael-Museum of Venice (1862) from Gazette Des Beaux-Arts, a French art review. Digitally enhanced from our own… Free Image from public domain license 
Vintage Victorian style retro typewriter engraving. Original from the British Library. Digitally enhanced by rawpixel. Free Image from public domain license 
Vintage Victorian style key engraving. Original from the British Library. Digitally enhanced by rawpixel. Free Image from public domain license 
Bolder-Atlas by Brockhaus, printed in 1849, an antique drawing of vintage astrological spheres and charts and diagrams.… Free Image from public domain license 
The Tricolor with a French flag themed balloon ascension in Paris, June 6th 1874. Original from Library of Congress.… Free Image from public domain license 
Le Ballon by Imprimeur E. Pichot. Original from Library of Congress. Digitally enhanced by rawpixel. Free Image from public domain license 
Still Life with Violin by William Harnett (1848-1892). Original from Library of Congress. Digitally enhanced by rawpixel. Free Image from public domain license 
Openings of the Panama Canals by John. S Pughe (1870-1909), a cartoon commentary that suggests that the age of aviation will… Free Image from public domain license 
Common Triton Horns, Charonia tritonis (1596–1610) by Anselmus Boëtius de Boodt. Original from the Rijksmuseum.… Free Image from public domain license 
Vintage European style key engraving from Six Semaines de vacances by Paul Poiré (1880). Original from the British… Free Image from public domain license 
Compass card from Arnold's Geographical Handbooks published by Edward Arnold (1899). Original from the British Library.… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Virgo. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Monoceros, Canis Minor and the Atelier Typographique.… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Canis Major, Lepus, Columba Noachi and the Cela Sculptoris.… Free Image from public domain license 
Vintage European style ship engraving from Strange yet True: interesting and memorable stories retold by James Macaulay M.D.… Free Image from public domain license 
Clipper Ship Three Brothers, the largest sailing ship in the world published by Currier & Ives. Original from Library of… Free Image from public domain license 
Zig-zag Passenger and Freight Train by an unknown artist. Original from Library of Congress. Digitally enhanced by rawpixel. Free Image from public domain license 
Popular Lectures on Human Nature, a book cover illustration by an unknown artist referencing Prof. W.G Alexander. Original… Free Image from public domain license 
Various designs of student Kerosene and oil lamps by Charles F.A Hinrichs. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (?-1831) astronomical chart illustration of Sagittarius and Corona Australis, Microscopium and… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Perseus and the Caput Medusae. Original from Library of… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the zodiac Cancer. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the zodiac Gemini. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of Lynx and the Telescopium Herschilii. Original from Library of… Free Image from public domain license 
Sidney Hall’s (?-1831) astronomical chart illustration of the Scorpio. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Pisces. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Auriga. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (?-1831) astronomical chart illustration of the Taurus. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Leo Major and the Leo Minor. Original from Library of… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Ursa Major. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Libra. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (?-1831) astronomical chart illustration of the cancer zodiac. A crab forming a constellation. Original… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Hercules and the Corona Borealis. Original from Library of… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Psalterium Georgii, Fluvius Eridanus, Cetus, Officinal… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Cepheus. Original from Library of Congress. Digitally… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of Gloria Frederici, Andromeda. Original from Library of Congress.… Free Image from public domain license 
Sidney Hall’s (?-1831) astronomical chart illustration of Bootes Canes Venatici, Coma Berenices, and Quadrans Muralis.… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Camelopardalis, Tarandus and the Custos Messium. Original… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Lacerta, Cygnus, Lyra, Vulpecula and the Anser. Original… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Draco and the Ursa Minor. Original from Library of… Free Image from public domain license