Louis-Jacques-Mandé Daguerre (18 November 1787 – 10 July 1851) was a French artist and physicist, recognized for his invention of the daguerreotype process of photography. He became known as one of the fathers of photography. Though he is most famous for his contributions to photography, he was also an accomplished painter and a developer of the diorama theatre.
Read more at Wikipedia: https://en.wikipedia.org/wiki/Louis_Daguerre
From the Library of Congress site, daguerreotype collection of portraits: http://www.loc.gov/pictures/search/?sp=1&co=dag&st=grid