Richard Serra 

Equal-Parallel: Guernica-Bengasi

, 1986

Four slabs 
Two: 58 1/2 x 58 1/2 x 9 1/2 inches (148.6 x 148.6 x 24.1 cm) 
Two: 58 1/2 inches x 16 ft. 4 1/8 inches x 9 1/2 inches (148.6 cm x 5 m x 24.1 cm)

Museo Nacional Centro de Arte Reina Sofía, Madrid

Photo by Lobato Studios 
© 2019 Richard Serra/Artists Rights Society (ARS), New York