One of the most notable German artists working today, Imi Knoebel studied with Joseph Beuys before garnering critical interest with his radically nonrepresentational art, which combines abstract painting with industrial materiality. His oeuvre, examined here, includes black-and-white photographs, hardboard pictures, cast concrete, and acrylic paintings on aluminum. This catalog accompanies a retrospective at the Sammlung Goetz that features the breadth of Knoebel's artistic output from the 1960s until the present day, focusing on the connections between form and content.