Troilus and Cressida (/ˈtrɔɪləs ... ˈkrɛsɪdə/) is a tragedy by William Shakespeare, believed to have been written in 1602. It was described by Frederick S. Boas as one of Shakespeare's problem plays. The play ends on a very bleak note with the death of the noble Trojan Hector and destruction of the love between Troilus and Cressida. The work has in recent years "stimulated exceptionally lively critical debate".

References:
https://en.wikipedia.org/wiki/Troilus_and_Cressida