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A loose association of seven liberal arts colleges in the Northeastern United States that are historically women's colleges ( Barnard College, Bryn Mawr College, Mount Holyoke College, Radcliffe College, Smith College, Vassar College, and Wellesley College).
What is Seven Sisters.
Four are in Massachusetts, two are in New York, and one is in Pennsylvania. Radcliffe (which merged with Harvard College) and Vassar (which is now coeducational) are no longer women's colleges