Original Daguerreotypie von J. L. M. Daguerre. Sehr selten. Gold getönt in einem Tonungsbad in einem Verfahren, das der Öffentlichkeit 1840 vorgestellt wurde. Das Bild wurde 1913 von E. Stenger und 1955 von R. Skopec restauriert. Es ist eines der beiden Daguerre-Werke in der Tschechischen Republik

Porträtsammlung des Technischen Nationalmuseums Prag, Tschechische Republik. Das 1908 gegründete Technische Nationalmuseum in Prag sammelte Dokumente über die Entwicklung vieler technischer Bereiche, Natur- und Exaktwissenschaften sowie der Industrie auf dem Gebiet der heutigen Tschechischen Republik.

Invented by Louis Daguerre and introduced worldwide in 1839,[3][4][5] the daguerreotype was almost completely superseded by 1856 with new, less expensive processes, such as ambrotype (collodion process), that yield more readily viewable images. There has been a revival of the daguerreotype since the late 20th century by a small number of photographers interested in making artistic use of early photographic processes. The first authenticated image of Abraham Lincoln, a daguerreotype of him as U.S. Congressman-elect in 1846, attributed to Nicholas H. Shepard To make the image, a daguerreotypist polished a sheet of silver-plated copper to a mirror finish; treated it with fumes that made its surface light-sensitive; exposed it in a camera for as long as was judged to be necessary, which could be as little as a few seconds for brightly sunlit subjects or much longer with less intense lighting; made the resulting latent image on it visible by fuming it with mercury vapor; removed its sensitivity to light by liquid chemical treatment; rinsed and dried it; and then sealed the easily marred result behind glass in a protective enclosure.