The in 2013 acquired photo­graphic collection by Dieter Schwerdtle (1952–2009) has already began in 2015, thanks to a generous donation from »Impulse für Kassel-​Stiftung«. Dieter Schwerdtle studied photography at the compre­hensive school of Kassel under Prof. Floris M. Neusüss (born 1937). Since 1981 he has worked as a freelance photographer and soon specialized on documenting the local art scene in Kassel and the documenta in particular. He extensively photographed documenta exhibitions 6 to 11 and partly contributed photo­graphic material to the »walking tours« series for the art magazine »Das Kunstforum«. The documenta archiv holds approx­imately 7.500 photo­graphic prints, 450 contact sheets, 1.000 slides and 600 sheets of negative strips, all of which are nearly completely catalogued.