-- LEHNERT & LANDROCK WAS A PHOTOGRAPHIC STUDIO RUN BY RUDOLF FRANZ LEHNERT AND ERNST HEINRICH LANDROCK ACTIVE IN TUNISIA AND EGYPT IN THE EARLY 20TH CENTURY, NOTED FOR PRODUCING ORIENTALIST IMAGES. 

-- RUDOLF FRANZ LEHNERT AND ERNST HEINRICH LANDROCK PRODUCED IMAGES OF NORTH AFRICAN PEOPLE, LANDSCAPES, AND ARCHITECTURE FOR A PRIMARILY EUROPEAN AUDIENCE. 

-- THESE IMAGES WERE MAINLY DISTRIBUTED IN MONOGRAPHS, THOUGH ALSO AS ORIGINAL PRINTS, PHOTOGRAVURES, AND LITHOGRAPHIC POSTCARDS.

-- A HELIOGRAVURE IS A PHOTOGRAPHIC PRINTING PROCESS MADE UP OF TWO STEPS: A PHOTOCHEMICAL PROCESS THAT CREATES THE INTAGLIO SURFACE WHERE THE PHOTOGRAPHIC IMAGE IS ETCHED INTO A COPPER PLATE. THE COPPER PLATE IS USED TO PRINT THE IMAGE ONTO ETCHING PAPER USING INKS. THE RESULTING IMAGE IS A HIGH-QUALITY PHOTOGRAPH WITH WARM RICH SEPIA TONES.