Troilus and Cressida | Troilus and Cressida (opera) | ''Troilus and Cressida, Act V, Scene II''. 1795 engraving by Luigi Schiavonetti |
Her 2008 opera Criseyde is based on Geoffrey Chaucer's Troilus and Criseyde, and is sung in Middle English.
The story of Troilus and Cressida is a medieval tale that is not part of Greek mythology; Shakespeare drew on a number of sources for this plotline, in particular Chaucer's version of the tale, Troilus and Criseyde, but also John Lydgate's Troy Book and Caxton's translation of the Recuyell of the Historyes of Troye.