Rudolf Franz Lehnert 1878 - 1948
Rudolf Franz Lehnert (Austrian, 1878-1948) and Ernst Heinrich Landrock (German, 1878-1966) worked together as the Lehnert and Landrock studio. Images are still available as there is a small shop in Cairo, run by the grandson where tourists can purchase postcards (2006). The family holds the copyright to the Lehnert and Landrock photographs.
The photographs were, in fact, taken by Lehnert (who trained as an artist,) while Landrock supplied the business acumen.