Martin Niemöller, a prominent Protestant pastor who opposed the Nazi regime. He spent the last seven years of Nazi rule in concentration camps. Germany, 1937. Photograph »

Martin Niemöller, a German theologian and pastor, on a visit to the United States after the war. A leader of the anti-Nazi Confessing Church, he spent the last seven years of Nazi rule in concentration camps. United States, October 4, 1946. Photograph »