The private art collection of the Hilti Art Foundation includes over 200 paintings, sculptures, and photographs of the finest quality, ranging from classical modernism to contemporary art. Volume 2 of the two-part collection catalog presents 120 selected works from the mid-20th century to the present, featuring artists from Josef Albers to Thomas Struth. The portion of the collection showcased in Volume 2 particularly focuses on abstract and concrete art from 1950 to today, exploring themes of material, surface, space, and movement, as well as form, color, rhythm, and light. This includes works by Fontana, Klein, Manzoni, Uecker, Mack, and Colombo, as well as by Albers, Bill, Fruhtrunk, von Graevenitz, Richter, and Sonnier. Larger bodies of work are represented by Gottfried Honegger, Gotthard Graubner, Imi Knoebel, and Sean Scully. A special emphasis is placed on photographs by Thomas Struth, which address themes of civilization and technology as well as nature and culture. Artists featured include Josef Albers, Max Bill, Hans Bischoffshausen, Karol Broniatowski, Alexander Calder, Gianni Colombo, Dadamaino, Helmut Federle, Lucio Fontana, Günter Fruhtrunk, Fritz Glarner, Camille Graeser, Gerhard von Graevenitz, Gotthard Graubner, Gottfried Honegger, Leiko Ikemura, Callum Innes, Konrad Klapheck, Yves Klein, Imi Knoebel, Willi Kopf, Norbert Kricke, Stéphane Kropf, Hanns Kunitzberger, Verena Loewensberg, Richard Paul Lohse, Heinz Mack, Piero Manzoni, François Morellet, Mariko Mori, Maurizio Nannucci, Julian Opie, Otto Piene, Gerhard Richter, Hanna Roeckle, Peter Roehr, Jan Schoonhoven, Sean Scully, Keith Sonnier, Klaus Staudt, Giovanni Di Stefano, Thomas Struth, Frank Thiel, Jean Tinguely, Günther Uecker, and Victor Vasarely.