Who is August Sander from On Photography and what is their importance?

August Sander (1876-1964) was a German photographer. He spent several years during the late nineteenth century working in the military as a photographer's assistant. He was a member, in 1920, of a group of progressive photographers and artists with plans to document contemporary society via portraiture. During the Nazi regime, Sander's work was largely suppressed. Much of his work was destroyed by the Nazis or in subsequent Allied bombing raids. In his latter life, Sander worked on landscapes and nature photography—though he is best known for his portraits.