Donald Judd 

Untitled

, 1973

Brass and fluorescent red acrylic sheet

Six elements, each: 34 x 34 x 34 inches (86.4 x 86.4 x 86.4 cm)

Solomon R. Guggenheim Museum, New York. Panza Collection, 1991

© Judd Foundation / Artists Rights Society (ARS), New York