Comprising more than 5,000 works of contemporary art dating from the 1960s to the present, the collection of the MUSEUMMMK für Moderne Kunst is one of the most important of its kind in the world. With canonical works by Carl Andre, Siah Armajani, Lothar Baumgarten, Thomas Bayrle, Bernd and Hilla Becher, Joseph Beuys, Alighiero Boetti, Miriam Cahn, Hanne Darboven, Walter De Maria, Marlene Dumas, Dan Flavin, Katharina Fritsch, Robert Gober, Donald Judd, Ilya Kabakov, On Kawara, Roy Lichtenstein, Mario Merz, Bruce Nauman, Claes Oldenburg, Nam June Paik, Blinky Palermo, Gerhard Richter, Reiner Ruthenbeck, Rosemarie Trockel, James Turrell, Bill Viola, Jeff Wall, Franz Erhard Walther and Andy Warhol, the holdings constitute an important source for art-historical research.