(This photograph was only discovered in 2002 and is now known to be the very first permanent photograph ever taken by Nicéphore Niépce - the father of photography. Taken in 1825)
This is an image of an engraving of a man walking a horse and it was made using a technique known as heliogravure. The method involves a piece of copper covered with light sensitive bitumen. This metal plate is exposed to light and creates an image which is then transferred to paper. The image has been declared a national treasure by the French government and it sold for $392,000 at auction to the French National Library.
More photographic firsts here.
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