 The vessels are Etruscan. They're very, very ancient, even by the time that the Romans come around. They are something that exists in, as far as we can tell, all Etruscan cities. And we don't really know what the origin of them is, but they are focused on this incredibly ancient idea of an eternal flame, which is a representation of Vesta, who is one of the Big Twelve goddesses in the Greek Olympian mythology.