"Two women performing on a barn door in the first known musical event at the Hollywood Bowl, ca.1920" Photograph of two women performing on a barn door in the first known musical event at the Hollywood Bowl, ca.1920. The makeshift stage is at center and consists of a large wooden door lying in the dirt, supporting a grand piano. One woman is seated at the piano while the other is standing nearby. The area around the stage is bare dirt, while a brush-covered hill can be seen in the background. Pictured here are Gertrude Ross and Anna Ruzena Sprotte.