Klaus Honnef, born 1939 in Tilsit, East Prussia, is a German art historian, art critic, exhibition curator and writes about artistic photography. He is the author of numerous books, was director of the Westfälischer Kunstverein (1970-1974), exhibition director of the Rheinisches Landesmuseum Bonn (1974-1999). At documenta 6 he was curator of the painting and photography departments together with Evelyn Weiss. He has arranged numerous solo exhibitions on the work of Bernd and Hilla Becher, Karl Blossfeldt, Hanne Darboten, Axel Hütte, Lawrence Weiner and others. Gabriele Conrath-Scholl, born in 1961, has been director of the Photographische Sammlung/SK Stiftung Kultur since 2007; before that she studied at the Düsseldorf Art Academy. She received a scholarship from the J. Paul Getty Museum in Los Angeles and, as an art historian, has realized exhibitions and publications on August Sander, Bernd and Hilla Becher, Boris Becker, Jim Dine, Judith Joy Ross, Wilhelm Schürmann, among others. Her preference is for concept-oriented documentary photography. She is particularly interested in the juxtaposition of historical and young photographic positions. Claudia Schubert is a research assistant and curator at the Photographische Sammlung/SK Stiftung Kultur, whose focus is on factual documentary photography as a means of artistic expression. Here, the art historian realizes exhibition projects and publications on William Guerrieri, Judith Joy Ross and Martin Rosswog, among others. In 2013 she received the DGPh Education Prize for photographic projects developed in schools, another focus of her work. Documentary photography, with views into the artistic-experimental field, is particularly close to her heart.