Sir Orfeo as being a parallel dimension to the everyday world rather than the Land of the Dead as in the Greek myth of Orpheus and Eurydice. The ability to move between one world and the other distinguishes the tale as told in its various British versions such as "Sir Orfeo" and the Shetland ballad "King Orfeo" where the captors are envisaged as inhabitants of a parallel fairy domain rather than as the infernal region of the Dead ruled over by Hades as in the Greek myth. Katharine Briggs sees the tale as related in British folk narratives as being equally influenced
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,