Cressida (; also
Criseida,
Cresseid or
Criseyde) is a character who appears in many
Medieval and
Renaissance retellings of the story of the
Trojan War. She is a Trojan woman, the daughter of
Calchas, a Greek seer. She falls in love with
Troilus, the youngest son of King
Priam, and pledges everlasting love, but when she is sent to the Greeks as part of a hostage exchange, she forms a liaison with the Greek warrior
Diomedes. In later culture she becomes an archetype of a faithless lover.