Mary Quinn Sullivan, born Mary Josephine Quinn, was a pioneering collector of European and American modern and contemporary art and gallerist, and a founding trustee of the Museum of Modern Art, which opened in rented space in New York City in November 1929. She also led a small group of Indianapolis, Indiana, art patrons who called themselves the Gamboliers and between 1928 and 1934 selected artworks of for the group that brought some of the first modern and contemporary works to the collections of the John Herron Art Institute, which later became the Indianapolis Museum of Art.

The Museum of Modern Art (MoMA) is an art museum located in Midtown Manhattan, New York City, on 53rd Street between Fifth and Sixth Avenues. The institution was conceived in 1929 by Abby Aldrich Rockefeller, Lillie P. Bliss, and Mary Quinn Sullivan. Initially located in the Heckscher Building on Fifth Avenue, it opened just days after the Wall Street Crash. The museum, America's first devoted exclusively to modern art, was led by A. Conger Goodyear as president and Abby Rockefeller as treasurer, with Alfred H. Barr Jr. as its first director. Under Barr's leadership, the museum's collection rapidly expanded, beginning with an inaugural exhibition of works by European modernists. Despite financial challenges, including opposition from John D. Rockefeller Jr., the museum moved to several temporary locations in its early years, and John D. Rockefeller Jr. eventually donated the land for its permanent site.