Portraits he painted from photographs of orphaned children who survived the Holocaust are the focus of Harry Tiefenbach’s latest art exhibition, Survivor Children. Some of the children were survivors of the Flossenburg concentration camp who were rescued by the United Nations Relief and Rehabilitation Administration in 1945. Their pictures, with their names on placards, were published in German newspapers in an effort to repatriate them to surviving families. Other portraits are based on photographs of children he downloaded from the website of the United States Holocaust Memorial Museum. But he found no information about them other than their names. Tiefenbach’s...