It's hard to believe there was a time when photographs of people didn't exist. That is why the recent discovery of what appears to be two men near the river's edge in a photo of Cincinnati taken in 1848 is a big deal among photography historians. The photo was taken September
24th, 1848. The photo is known as a daguerreotype.
The credit for photgraphing a human for the first time is generally given to Louis Daguerre, the inventor of the daguerreotype process. In an 1838 photo he took of Paris, Daguerre caught an image of a man who appears to be getting his shoes or boots shined at a street corner.