A steel sculpture by Richard Serra titled Sequence, dated 2006.

Richard Serra 

Sequence

,
2006

Weatherproof steel

Overall: 12 ft. 9 inches x 40 ft. 8 inches x 65 ft. 2 inches (3.9 x 12.4 x 19.9 m)

The Doris and Donald Fisher Collection at the San Francisco Museum of Modern Art

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

A steel sculpture by Richard Serra titled Sequence, dated 2006.