Helen Francesca Traubel (June 16, 1899 – July 28, 1972) was an American opera and concert singer. A dramatic soprano, she was best known for her Wagnerian roles, especially those of Brünnhilde and Isolde. Born and raised in St. Louis, Missouri, she began her career as a concert singer and went on to sing at the Metropolitan Opera from 1937 to 1953. Starting in the 1950s, she also developed a career as a nightclub and cabaret singer as well as appearing in television, films and musical theatre. Traubel spent her later years in Santa Monica, Cal…