 The outline below is only a capsule summary; much of the concrete information about the Eleusinian Mysteries was never written down.For example, only initiates knew what the "kiste", a sacred chest, and the calathus, a lidded basket, contained.Hippolytus of Rome, one of the Church Fathers writing in the early 3rd century AD, discloses in "Refutation of All Heresies" that "the Athenians, while initiating people into the Eleusinian rites, likewise display to those who are being admitted to the highest grade at these mysteries, the mighty, and marvellous, and most perfect secret suitable for one initiated into the highest mystic truths