Carte-de-Visite Portrait of Leon Liebman by Frederick Gutekunst, Philadelphia, Pennsylvania Carte-de-visite (CDV) portrait photograph of Leon Liebman, taken by Frederick Gutekunst at his studio located at 704 and 706 Arch Street, Philadelphia, Pennsylvania. The photograph is undated, but based on Gutekunst's career, it is estimated to be from around 1875.