This is the first know photo of a human being. It is a Daguerreotype that was taken in 1838 in the Boulevard du Temple in Paris by the inventor of the process Louis Daguerre. This process involved exposing a chemically treated metal plate for 10 minutes. There were other people and carriages in the photo but because they were moving, they didn’t show up.
Only this man and a bootblack can be seen in this picture as they stood long enough without moving a lot during the time of exposure.