Mildred Miller Posvar was a star performer at the Metropolitan Opera from 1951 to 1974 and the wife of Wesley Posvar, the fifteenth Chancellor of the University of Pittsburgh. The Mildred Miller Posvar Papers are a mixed media collection primarily documenting her performing career at the Met. The materials also cover her training at the New England Conservatory of Music, her position as the First Lady of the University of Pittsburgh, and her involvement in the Opera Theatre of Pittsburgh. The collection includes compact discs, video tapes, newspaper and magazine clippings, programs, photographs, scrapbooks, and correspondence.