Dimitrios N. Martimianakis was a known and prizewinning professional photographer. He had a photographic studio, initially at Aigio (Peloponnese, Greece, ca. 1870) and later in Athens (ca. 1876). He took pictures of the first modern Olympics in Athens (1896) and exhibited his work at Greek and international fairs. It seems that in the 1890s he was professionally active also in Piraeus (Greece), while later he opened a studio in Cairo (Egypt) as well. He was the personal photographer of the then crown prince Constantine, while his daughter Eleftheria was a professional photographer as well.