Orpheus (north east Danube valley) and even describes him wandering into Hyperborea and Tanais (ancient Greek city in the Don river delta) due to his grief. The story of Eurydice may actually be a late addition to the Orpheus myths. In particular, the name "Eurudike" ("she whose justice extends widely") recalls cult-titles attached to Persephone. According to the theories of poet Robert Graves, the myth may have been derived from another Orpheus legend, in which he travels to Tartarus and charms the goddess Hecate. The myth theme of not looking back, an essential precaution in Jason's raising of chthonic Brimo Hekate
Orpheus under Medea's guidance, is reflected in the Biblical story of Lot's wife when escaping from Sodom. More directly, the story of Orpheus is similar to the ancient Greek tales of Persephone captured by Hades and similar stories of Adonis captive in the underworld. However, the developed form of the Orpheus myth was entwined with the Orphic mystery cults and, later in Rome, with the development of Mithraism and the cult of Sol Invictus. According to a Late Antique summary of Aeschylus' lost play "Bassarids", Orpheus, towards the end of his life, disdained the worship of all gods except the sun,