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Princeton University has a long history of commissioning public art by the likes of Henry Moore, Louise Nevelson, Alexander Calder and Pablo Picasso, dating back to the 1960s.

I prefer to think of it as a Louise Nevelson sculpture suspended above.

There was also an envelope scribbled with six names in blue ink: “Mitchell, Frankenthaler, Hepworth, Bourgeois, Krasner, Nevelson.”

Nevelson’s collages, which combine cardboard scraps with paper, metallic tape and wood, have an entrancing dissonance.

She remembers a party in his spare Gracie Square apartment where Ms. Nevelson, Robert Rauschenberg and Andy Warhol circulated among their own artworks with other guests.