To the archaeologist the cause of this lies in the ritual on which the play is based. All Greek tragedies that we know have as their nucleus something which the Greeks called an Aition--a cause or origin. They all explain some ritual or observance or commemorate some great event. Nearly all, as a matter of fact, have for this Aition a Tomb Ritual, as, for instance, the Hippolytus has the worship paid by the Trozenian Maidens at that hero's grave. The use of this Tomb Ritual may well explain both the intense shadow of death that normally hangs over the Greek tragedies, and also perhaps the feeling of the Fatality, which is, rightly or wrongly, supposed to be prominent in them