“Work out of your work.” This simple statement from Richard Serra, made in a 1998 interview, defines the octogenarian’s art: sculptures original in their size (massive), material (often pure steel), and purpose (leaping into the viewer’s space). Three exhibitions opening simultaneously at several of Gagosian’s New York City spaces pay homage to the sculptor—as does the newly reopened Museum of Modern Art, which is installing his 2015 work, Equal, in its permanent collection. —J.V.

“Triptychs and Diptychs,” featuring new drawings by Serra, runs through November 2, 2019, at the 980 Madison Avenue gallery. “Forged Grounds”—four new works from Serra’s Rounds series—fills the entire gallery space at 555 West 24th Street, and runs through December 7, 2019. “Reverse Curve,” a single sculpture measuring 99 feet long and 13 feet high, is on view through February 1, 2020, at the 522 West 21st Street gallery.