On this day, August 19th 1939
France gives gift of photography to the world
August 19th, 1839: Louis Daguerre has received a lifetime pension from France in exchange for his recent invention, a process by which visual impressions from a camera are transferred to metal plates. France announces the technology is "free to the world" and the public first learns of photography.
I didn't realise it but we have a very old photo back into the 19th century that I've often wondered about because it is on a thin what looks like tin plate. Wondered why it was on a metal plate. It is of my great-great-grandfather so could be as old as 1860s.