The Twelve Olympians

The Twelve Olympians, also known as the Dodekatheon, were the principal gods of the Greek pantheon, residing atop Mount Olympus. The classical scheme of the Twelve Olympians (the Canonical Twelve of art and poetry) comprises the following gods:

The first ancient reference of religious ceremonies for the 12 Olympians is found in the Homeric Hymn to Hermes.

There was a great deal of fluidity when it came to who was counted among their number in antiquity.  Around 400 B.C. Herodorus included in his Dodekatheon the following deities: Zeus, Poseidon, Hera, Athena, Hermes, Apollo, Alpheus, Cronus, Rhea and the Charites.  Herodotus includes Heracles as one of the Twelve.

Lucian also includes Heracles, and also includes Asklepios, as members of the Twelve, without explaining which two had to give way for them. At Kos, Heracles and Dionysus are added to the Twelve, and Ares and Hephaestus are left behind.  However, Pindar, Apollodorus, and Herodorus disagree with this. For them Heracles is not one of the Twelve Gods, but the one who established their cult.

Plato connected the Twelve Olympians with the twelve months, and proposed that the final month be devoted to rites in honor of Pluto and the spirits of the dead, implying that he considered Hades, one of the basic chthonic deities, to be one of the Twelve.  Hades is phased out in later groupings due to his chthonic associations.  In Phaedrus Plato aligns the Twelve with the Zodiac and would exclude Hestia from their rank.

Hestia is sometimes displaced by Dionysus.  Hebe, Helios and Persephone are other important gods, goddesses, which are sometimes included in a group of twelve.

The Twelve Olympians gained their supremacy in the world of gods after Zeus led his siblings to victory in war with the Titans. Zeus, Hera, Poseidon, Demeter, Hestia, and Hades were siblings. Ares, Hermes, Hephaestus, Aphrodite, Athena, Apollo, Artemis, the Charites, Heracles, Dionysus, Hebe, and Persephone were children of Zeus. Although some versions of the myth state that Hephaestus was born of Hera alone.