1822 : Realisation of the copy of a drawing by the single action of light on a glass plate coated with Judea bitumen (portrait of the Pope Pius VII).
<Context ref.>Photographer Nicephore Niepce - History of Photography. [En línia]. [Consulta: 10/06/2006]. Disponible a: <http://www.niepce.com/pagus/hislife2.html>