Untitled Estructura (Yellow), 1966/2016 and Untitled, 2013

Acrylic and aluminium
152.4 x 111.8 x 12.7 cm
60 x 44 x 5 in
AP1 of 1 + 1 AP

&

Acrylic on canvas
182.9 x 91.4 cm
72 x 36 in

Permanent Collection of the National Gallery of Art, Washington D.C., USA