Gaëtan Henri Alfred Edouard Léon Marie Gatian de Clérambault (2 July 1872 – 17 November 1934) was a French psychiatrist. Apart from his psychiatric studies, he was an acclaimed painter and wrote on the costumes of various native tribes. He was also a professional photographer, from 1914 to 1918 he took around 30,000 photographs, some of the photos taken as part of a research project involving symptoms of hysteria. Many of his photos were later placed in the Musée de l'Homme. Source: Wikipedia (en)