Within the many themes which Graham incorporated into her work, there were two that she seemed to adhere to the most—Americana and Greek mythology. One of Graham's most known pieces that incorporates the American life theme is "Appalachian Spring" (1944). She collaborated with the composer Aaron Copland—who won a Pulitzer Prize for his work on the piece—and Noguchi, who created the nonliteral set. As she did often, Graham placed herself in her own piece as the bride of a newly married couple whose optimism for starting a new life together is countered by a grounded pioneer woman and a sermon-giving revivalist. Two of Graham's pieces—"Cave of Heart" (1946) and "Night Journey" (1947)—display her intrigue not only with Greek mythology but also with the psyche of a woman, as both pieces retell Greek myths from a woman's point of view.