But Hera without union with Zeus -- for she was very angry and quarrelled with her mate -- bare famous Hephaestus, who is skilled in crafts more than all the sons of Heaven. Hesiod Theogony
Hephaestus ( Ἥφαιστος ) (also Hêphaistos or Hephaestos) is the Greek god of fire and the forge. There is more material about his approximate Roman equivalent at the entry for Vulcan. Hephaestus is the god of blacksmiths, craftsmen, artisans, sculptors, metals and metallurgy and fire. He was worshipped in all the manufacturing and industrial centers of Greece, especially Athens. Though his forge lay in the volcanic heart of Lemnos, Hephaestus became associated with Mount Etna by Greek colonists in Sicily.
Hephaestus and his brother Ares are sons of Hera, with or without the cooperation of Zeus. In classic and late interpretations, Hera bore him alone, in jealousy for Zeus's solo birth of Athena, but as Hera is older than Zeus in terms of human history, the myth may be an inversion. Indeed, in some versions of Athena's birth, she only enters the world after Zeus' head is split open by a hammer-wielding Hephaestus. Either way, in Greek thought, the fates of the goddess of wisdom and war (Athena) and the god of the forge that makes the weapons of war (or at least their births) were linked. Hephaestus and Athena Ergane (patroness of craftsman and artisans), were honored at a festival called Chalceia on the thirtieth day of Pyanopsion. Hephaestus crafted many of Athena's battlements, along with those of the rest of the gods and the mortals who received their favor.
Hephaestus Return to Olymp, from a Vase painting, Munich
An Athenian founding myth tells that Athena refused a union with Hephaestus, and that when he tried to force her she disappeared from the bed, and Hephaestus ejaculated on the earth, impregnating Gaia, who subsequently gave birth to Erichthonius of Athens; then the surrogate mother gave the child to Athena to foster, guarded by a serpent. Hyginus made an etymology, of strife between Athena and Hephaestus ("Eri-") and the Earth-child ("chthonios"). Some readers may have the sense that an earlier, not-virginal Athene is disguised in a convolutated re-making of the myth-element. At any rate, there is a Temple of Hephaestus (Hephaesteum or the so-called "Theseum"), located at the foot of the Acropolis (illustyration, above).
Hephaestus also crafted many of the other magnficent equipage of the gods, and almost any finely-wrought metalwork imbued with powers that appears in Greek myth is said to have been forged by Hephaestus: Hermes's winged helmet and sandals, the Aegis breastplate, Aphrodite's famed girdle, Achilles's armor, Heracles's bronze clappers, Helios's chariot, Eros's bow and arrows and Hades's helmet of invisibility. Hephaestus worked with the help of the chthonic Cyclopes, his assistants in the forge. He also built automatons of metal to work for him. He gave to blinded Orion his apprentice Cedalion as a guide.
In Iliad i.590, Zeus threw Hephaestus from Olympus because he released his mother Hera who was suspended by a golden chain between earth and sky, after an argument she had with Zeus. Hephaestus fell for nine days and nights before landing on the island of Lemnos where he grew to be a master craftsman and was allowed back into Olympus when his ability and usefulness became known to the gods.
The Temple of Hephaestus, Athens: eastern face.
Hephaestus was quite ugly; he was crippled and misshapen at birth: in the vase-paintings, his feet are sometimes back-to-front. In art, Hephaestus was shown lame and bent over his anvil. He walked with the aid of a stick. Hera, mortified to have brought forth such grotesque offspring, promptly threw him from Mount Olympus. He fell, as he tells it himself in the Iliad (xviii.395) many days and nights and landed in the Ocean where he was brought up by the Oceanid Thetis (mother of Achilles) and Eurynome.
Hephaestus gained revenge against Hera for rejecting him by making her a magical golden throne which, when she sat on it, didn't allow her to leave it. The other gods begged Hephaestus to return to Olympus to let her go but he repeatedly refused. Dionysus got him drunk and took him back to Olympus on the back of a mule. Hephaestus released Hera after being given Aphrodite, the goddess of love, as his wife.
Hephaestus and Aphrodite
In the Olympian order, Hephaestus was often paired with Aphrodite. Although married to Hephaestus, Aphrodite gave herself in secret to Ares, according to a tale in the Odyssey. When Hephaestus found out about it from Helios, the Sun, who sees all, he surprised them during one of their trysts ensnared in his invisibly fine and unbreakable net and left them exposed for all of Olympus to see. The Thebans told that the union with Ares produced Harmonia, as lovely as a second Aphrodite. But of her union with Hephaestus, there was no issue, unless Virgil was serious when he said that Eros was their child (Aeneid i.664). But in Homer's Iliad the consort of Hephaestus is a lesser Aphrodite, Aglaia "the glorious," the youngest of the Graces and Hesiod agrees (Theogony 945). Hephaestus fathered several children with mortals and immortals alike. One of those children was the robber Periphetes. With Thalia, Hephaestus was sometimes considered the father of the Palici.
Hephaestus was somehow connected with the archaic, pre-Greek Phrygian and Thracian mystery cult of the Cabari, who were called the Hephaistoi, "the Hephaestus-men," in Lemnos.