by stone as an entrance, as a fixed route to the underworld. In the Odyssey book X, Circe gives to Odysseus specific instructions on what to do at the entrance to Hades. Just in the context of these [...] image of a real descent to the underworld. Like many others heroes and mythical kings, - e.g. Odysseus and Heracles - Theseus descends into the kingdom of Hades. Owing to his friendship with Pirithous [...] the underworld, describing the immediate surroundings of the entrance to Hades ( Od. X 508-520), Circe makes reference to a stone and to the confluence of the two rivers (Pyriphlegethon and Cocytus) probably