Associate Professor of modern art history Marek Wieczorek participated with a paper on "The Nature of Spirit: Piet Mondrian between Physics and Metaphysics" in an international conference on "The Lives of Form: Abstract Art and Nature," held at the Jacobs University in Bremen, Germany, 13-15 August 2009. He also wrote the lead catalog essay for the traveling retrospective of the pioneer of abstract sculpture Georges Vantongerloo: Für eine neue Welt: Georges Vantongerloo und seine Kreise von Mondrian bis Bill [For a new World: Georges Vantongerloo and his Circle, from Mondrian to Bill] held at the Lehmbruck Museum, Duisburg, 10 October 2009 to 10 January 2010, and at the Gemeentemuseum, The Hague, 23 January 2010 to 16 May 2010. The titles of his contributions to the catalog are: "For the New World: Georges Vantongerloo and the Promise of Art" and "The 'Incommensurable' Georges Vantongerloo, 1945-1965."