Gods of the Underworld.

The Underworld was the House of Hades, the world of the dead, ruled by Zeus' brother, Hades. The name "Hades" means the "Unseen One," and one of Hades' most prized possessions was his "Cap of Darkness" which made him invisible. The Greeks did not typically worship him; only at one place in Greece did he have a temple. In Elis there was a temple to Hades that was open only once a year, and only the priest was allowed to enter. In the land of the Thesprotians in northwest Greece, there was an oracle of the dead, sacred to Hades and Persephone, which is probably where Odysseus made his descent into the Underworld. By and large, the Greeks preferred not to talk about Hades.

Persephone and Hecate.

Hades' wife was Persephone, queen of the Underworld and...