Werther
Description of Massenet's Werther from the Metropolitan Opera's website:
One of opera’s greatest depictions of impossible love, Werther is based on Goethe’s epistolary novel The Sorrows of Young Werther. A sensation when it appeared in 1774 (and partly inspired by the author’s own experiences), it tells the story of a melancholy poet whose love for a married woman and general disaffection with the world lead to his suicide. The archetype of the artistic, brilliant, and doomed young man rebelling against the establishment has resonated through the ages in literature, theater, film, and music.