Dora Philippine Kallmus, also known as Madame D'Ora, was an Austrian fashion and portrait photographer. In 1905 she was the first woman to be admitted to theory courses at the Graphische Lehr- und Versuchsanstalt (Graphic Training Institute). That same year she became a member of the Association of Austrian photographers.
In 1907, she established her own studio with Arthur Benda in Vienna called the Atelier d’Ora or Madame D'Ora-Benda. The name was based on the pseudonym "Madame d'Ora", which she used professionally. D'ora and Benda operated a summer studio from 1921 to 1926 in Karlsbad, Germany, and opened another gallery in Paris in 1925. She was represented by Schostal Photo Agency (Agentur Schostal) and it was her intervention that saved the agency's owner after his arrest by the Nazis, enabling him to flee to Paris from Vienna.
Her subjects included Josephine Baker, Coco Chanel, Tamara de Lempicka, Alban Berg, Maurice Chevalier, Colette, and other dancers, actors, painters, and writers.