Hippolyte Bayard was a French photographer and pioneer in the history of photography. He invented his own process known as direct positive printing and presented the world's first public exhibition of photographs on 24 June 1839. He claimed to have invented photography earlier than Louis-Jacques Mandé Daguerre in France and William Henry Fox Talbot in England, the men traditionally credited with its invention.
Bayard experimented with the new medium taking photos of plant speciments, statuary (including posing with them for self portraits), street scenes, urban landscapes, architectural photos, and portraits. He photographed prominent figures and an ordinary worker. He also advocated combination printing and was one of the founders of a photo society.