Lizzie Plummer Bliss, known as Lillie P. Bliss, was an American art collector and patron. At the beginning of the 20th century, she was one of the leading collectors of modern art in New York. One of the lenders to the landmark Armory Show in 1913, she also contributed to other exhibitions concerned with raising public awareness of modern art. In 1929, she played an essential role in the founding of the Museum of Modern Art. After her death, 150 works of art from her collection served as a foundation to the museum and formed the basis of the in-house collection. These included works by artists such as Paul Cézanne, Georges Seurat, Paul Gauguin, Henri Matisse, Pablo Picasso and Amedeo Modigliani.

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.