Famed American artist and sculptor Richard Serra, known for turning curving walls of rusting steel and other malleable materials into large-scale outdoor artworks installed across the world, died on March 26 at his home on Long Island. He was 85.

Known by his colleagues as the “poet of iron,” Serra became world-renowned for his structures of arcs, spirals and ellipses. His works have been installed in landscapes and included in the collections of museums, from the MOMA in New York to the deserts of Qatar. In 2005, eight major works by Serra were installed permanently at the Guggenheim Museum in Spain.