Amongst the many varied faces of Naples, a few are more mysterious. We will explore the pre-Christian sites where the cult of Apollo was celebrated under the authority of his prophetess, the Cumaean Sibyl. We will explore the origins of other myths such as that of Isis and Mithras. Naples has been witness to many countless beliefs, such as those of the Bacchanalia, the Virgilian Myth and the cult of the Souls in Purgatory. The tour ends with the visit at the Chapel of San Severo.