In Greek and Roman mythology, Creusa is the wife of Aeneas, and the mother of Ascanius. According to Apollodorus, she is the daughter of Priam and Hecuba. A number of sources describe her presence during the sack of Troy, with her often fleeing the city alongside her husband. In Virgil's Aeneid, Creusa is lost in the confusion while their family is trying to escape, leading Aeneas to turn back to look for her; there he is met with her shade, which foretells of his future journey to Hesperia, where he is told he will marry a different woman.

In Greco-Roman mythology, Aeneas was a Trojan hero, the son of the Trojan prince Anchises and the Greek goddess Aphrodite. His father was a first cousin of King Priam of Troy, making Aeneas a second cousin to Priam's children. He is a minor character in Greek mythology and is mentioned in Homer's Iliad. Aeneas receives full treatment in Roman mythology, most extensively in Virgil's Aeneid, where he is cast as an ancestor of Romulus and Remus. He became the first true hero of Rome. Snorri Sturluson identifies him with the Norse god Víðarr of the Æsir.