Her daughter-in-law Mahnaz Ispahani Bartos confirmed the death.

With her husband, Armand Phillip Bartos, Mrs. Bartos, known in private life as Celeste Gottesman Bartos, was long a quietly visible presence on the city's cultural landscape.

At the library's flagship branch, at Fifth Avenue and 42nd Street, the Celeste Bartos Forum — a vast lecture hall that in 1987 was restored to combine its original Beaux-Arts splendor with late-20th-century technology — bears her name. So does the library's Celeste Bartos Education Center, likewise used for lectures and public programs.

Gottesman Exhibition Hall, the library's main exhibition space, was a gift of Mrs. Bartos and her sisters, Miriam Wallach and Joy Ungerleider-Mayerson.

At MoMA, Mrs. Bartos endowed the chief film curator's chair and the Celeste Bartos Film Preservation Center, the museum's $11.2 million conservation center in Hamlin, Pa. Avid collectors of contemporary art, she and her husband gave many pieces to the museum, including works by Jasper Johns, Helen Frankenthaler and Barnett Newman.

A daughter of D. Samuel Gottesman and the former Jeane Herskovitz, Celeste Ruth Gottesman was born in New York City on Dec. 25, 1913. Her father, a pulp and paper magnate and financier, helped found the Central National Bank in New York.

After earning a bachelor's degree in philosophy and French from Wheaton College in Norton, Mass., in 1935, Celeste Gottesman married Jerome John Altman; the marriage ended in divorce. She married Mr. Bartos, an architect, in 1951.

Mr. Bartos died in 2005. Mrs. Bartos is survived by two sons, Jonathan Altman, from her first marriage, and Adam Bartos, from her second; three stepchildren, Armand Bartos Jr., Mary Bartos and Michael Bartos; and two grandchildren.

Mrs. Bartos's sisters died before her, as did a daughter from her first marriage, Jenifer Altman.

Besides Manhattan, Mrs. Bartos had homes in East Hampton, on Long Island; Santa Fe, N.M.; and Round Hill, Jamaica.

Mrs. Bartos's other philanthropic endeavors included support of Film Forum, Anthology Film Archives and the Museum of the Moving Image in New York; the Art Institute of Chicago; and the Massachusetts Institute of Technology Media Lab.