The oldest heliographic engraving known in the world. It is a reproduction of a 17th century Flemish engraving, showing a man leading a horse. It was made by the French inventor <a href="https://en.wikipedia.org/wiki/Nic%C3%A9phore_Ni%C3%A9pce" class="extiw" title="en:Nicéphore Niépce">Nicéphore Niépce</a> in 1825, with an <a href="https://en.wikipedia.org/wiki/Heliography" class="extiw" title="en:Heliography">heliography</a> technical process. The <a href="https://en.wikipedia.org/wiki/Biblioth%C3%A8que_nationale_de_France" class="extiw" title="en:Bibliothèque nationale de France">Bibliothèque nationale de France</a> bought it for €450,000 in 2002, deeming it as a "national treasure".
Nicéphore Niépce (1765-1833)
Bibliothèque nationale de France