It has been claimed that the French photographer Lerebours photographed some nudes as early as 1840, only one year after the historic introduction of Daguerre's process (P. Lacey, "The History of the Nude in Photography"). It was suggested that the interest in the nude at this period was not only aesthetic- professional models were among the first live subjects capable of holding a pose for the required five to ten minutes. The Parisian photographers, Nadar and Durieu, were among the first in the world to photograph nudes.