Return to earth: the end of the story of Erechtheus. There is not one founder of Athens but many autochtones repeating the inaugural figure of the founder without nonetheless incarnating it fully. It is the particular death of Erechtheus that ends the long founding operations. Hidden in the civic earth, his death under Poseidon’s revengeful trident is neither a crime nor a “beautiful death” but a founding death. Indeed, the death of Erechtheus gives birth to a founding partnership of choice for those Athenians in search of their roots: Erechtheus, the autochtonous king, and Poseidon, the god with a solid basis and unmovable foundations, would become associated in the cult as Poseidon-Erechtheus or Erechtheus-Poseidon. Because of this founding partnership, the autochtonous city succeeded in the challenge of self-foundation. Through Erechtheus, it was all Athenians that Poseidon could root in their own land.