In Greek mythology, the Netherworld can generally be divided into three parts: the dwelling place of the souls of ordinary people after death, "Asphodel Meadows"; the blessed place where heroes and innocent pure souls reside, "Elysium"; and the place of punishment for sinful souls, "Tartarus." In addition to all the deceased souls, some of the Titans overthrown by Zeus were also imprisoned in the Netherworld.
And poet Dante in his Divine Comedy mentioned the three worlds after the death of the departed — [Purgatory], [Hell], and [Heaven].
Between the two, is there a curious sense of déjà vu?
Indeed, as the ultimate future fusion freak, Christian mythology likely borrowed the triple-setting of the afterlife from Greek mythology.