Clyfford Still, ‘1957-J No. 2 (PH-401)’, 1957
no comment

Martin Kippenberger, ‘X Y Z’, 1989

Lawrence Weiner, ‘X Y & Z’, 2006
', 2011, gold leaf on unfolded cardboard box, 104 x 177 cm. 'Alphabet (Y)', 2011, gold leaf on unfolded cardboard box, 88 x 162 cm. 'Alphabet (Z)', 2011, Gold leaf on unfolded cardboard box, 93 x 211 cm..jpg)
Danh Vo, ‘Alphabet (X)’, ‘Alphabet (Y)’, ‘Alphabet (Z)’, 2011

Gilbert & George, ‘Fuck’, 1977

Fernando Calhau, ‘Sem Título #514’, 1989

Marlene McCarty, ‘Love, AIDS, Riot’, 1990
, ‘Fuck’, 2004, wax crayons on an envelope, 16 x 11.5 cm.jpg)
Yoshitomo Nara, ‘Fuck’, 2004

Brian Jones, ‘If You See Kay’, 2005
, ‘In the Name of Amadu Diallo and Shyne,’ 2005, spray enamel, latex and Flashe on linen, 76 x 50.7cm.jpg)
Nate Lowman, ‘In the Name of Amadu Diallo and Shyne’, 2005

Mario Schifano, ‘Aut aut’, 1960

Andy Warhol, ‘Double Elvis’, 1963

Antony Donaldson, ‘Mulsanne Straight’, 1964

Brice Marden, ‘Untitled’, 1965
', 1968, pencil on paper, 19 x 28,5 cm.jpg)
William Anastasi, ‘Subway Drawing (V. Dwan)’, 1968
Jo Baer, ‘Untitled (vertical flanking diptych - red)’, 1966-74

Guy de Cointet, Two Drawings, 1974
![Thomas Schutte, Paar [Pair], 1979](http://search.it.online.fr/covers/wp-content/Thomas_Schutte,_Paar_[Pair],_1979.jpg)
Thomas Schutte, ‘Paar’ [Pair], 1979

Thomas Schutte, ‘Paare’, 1980, lined up in the studio
, ‘Untitled (Jet Mixer Ejector),’ 1985, two elements--acrylic on colored Xerox, 27.9 x 21.6 cm.jpg)
Jean Michel Basquiat, ‘Untitled (Jet Mixer Ejector),’ 1985

Roy Lichtenstein, ‘Imperfect Diptych’, 1988

Peter Friedl, ‘5 bis 6 Amazonaskrokodile’, 1990

Bernard Piffaretti, ‘Sans titre’, 1991

Joan Mitchell, ‘Sunflowers II’, 1992

Dan Walsh, ‘Reflector’, 1995, acrylic on canvas, 178 x 177.8 cm
_Blurriness_(Agfa_tre.jpg)
Nina Childress, ‘Blurriness (Kodak tree) Blurriness (Agfa tree)’, 2000

Adrienne Ranson, ‘Becoming’, 2004

Lisa Tan, ‘Two in the Labyrinth’, 2006

Marijn van Kreij, ‘Untitled (Styles, Crews, Flows, Beats)’, 2007

Ryan Gander, ‘Investigation #13, Look’, 2008

Dan Rees, ‘Payne’s Grey and Vermillion’, 2010

Brent Wadden, ‘Large Double Double,’ 2014