Der Ball ist rund : Kreis, Kugel, Kosmos - Wullen, Moritz; Ebert, Bernd (Staatliche Museen zu Berlin, 2006)
Exhibition held June 8-Aug. 27, 2006 at the Pergamonmuseum, Berlin and during the summer of 2007 at the Kunsthalle Würth, Schwäbisch Hall