Edward Zajec
Prostor
1969

Georg Nees
Protectoroid
1986

Peter Balla
QU 4 ST

Robert Mallary
Quad II
1968

Robert Mallary
Quad III
1969

Robert Mallary
Quad IV

Herbert W. Franke / Georg Färber
Quadrate
1969/1970

Norman White
Quand Même
1973

Georg Nees
Rahmenwerk Plus
1986

Béla Julesz
Random Dot Stereogram

Masao Kohmura / Haruki Tsuchiya / CTG Japan
Random Walk Kennedy
1967

Charles "Chuck" Csuri / James Shaffer
Random War
1967

Charles "Chuck" Csuri
Random light and shadow
1967

Vera Molnar
Rectangles yellow, blue and black
1953

Hiroshi Kawano
Red Tree
1972

Helmar Frank
Redundanz 0,32
undated

Josef Albers
Redwindow
1923

Francois Morellet
Relache02
1992

Manfred R. Schroeder
Relative Primzahlen
1972

Manfred Mohr
Relief 14/268 Auflösungszeichen
1968

Georg Nees
Relief in der Betonwand

Herman de Vries
Relief
1966/67

Vera Molnar
Repentirs
1992

CTG Japan
Return to Square A
1967 / 68

CTG Japan
Return to Square B
1967 / 68

Heinrich Heidersberger
Rhythmogramm 3782/247

Roland K. Fuchshuber
Rocker
1960

Josef Albers
Rolled Wrongly
1931

Roman Verostko
Roman views angel choir fresco
1954

A. Michael Noll
Rotating Hypercubes