Mary Dorothea Frederica Steen (28 October 1856 – 7 April 1939) was a Danish photographer and feminist. At the age of 28, she opened a studio in Copenhagen where she specialized in indoor photography. She later became Denmark's first female court photographer, working not only with the Danish royal family but, at the invitation of Princess Alexandra, with the British royal family too. She also played an important part in improving conditions for female workers and encouraging women to take up the profession of photography.
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