Etruscan mural(pre-500 B.C.): the Mounted Achilles ambushes Troilus.

In Greek mythology, Troilus is a young Trojan prince, one of the sons of King Priam and Hecuba. Prophecies link Troilus' survival to that of Troy and so he is murdered by Achilles. Sophocles was one of the writers to tell this tale. In a popular addition to the story, originating in the 12th century, Troilus falls in love with Cressida, whose father has defected to the Greeks. Cressida pledges her love to Troilus but she soon switches her affections to the Greek hero Diomedes when sent to her father in a hostage exchange.

Chaucer and Shakespeare are among the authors who wrote works telling the story of Troilus and Cressida. Within the medieval tradition, Troilus was regarded as a paragon of the faithful courtly lover and also of the virtuous pagan knight. However, Shakespeare clearly sees him as like Romeo, rendered dangerous and ineffective by his own idealism. His death is not shown but his self-destructive despair ends the play.

Ambush of Troilus by Achilles, Etruscan: mural at the Tomb of the Bulls, Tarquinia. Picture and data courtesy of the Yorck Project, under Creative Commons Attribution-Share- Alike License (Wikipedia)