Greek Mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning the origin of the cosmos, the rule of the Olympian gods, and the deeds of heroes such as Heracles and Odysseus. It survives mainly through the epic poetry of Homer and Hesiod, later drama, and Roman retellings, and remains one of the most influential mythological traditions in Western culture.

By Mythographia Editorial Team Reviewed by Mythographia Editorial Team Updated 2026-09-05

Cosmology

Hesiod's Theogony gives the system its shape: Chaos comes first, then Gaia (Earth), Tartarus (the abyss beneath the earth), and Eros (desire) arise on their own, with no parent named. Gaia bears Uranus (Sky) to cover her, and from their union come the twelve Titans, the three one-eyed Cyclopes, and the three hundred-handed Hecatoncheires. Uranus hides his monstrous children back inside Gaia, so she persuades the youngest Titan, Kronos, to castrate his father with a sickle; Aphrodite is born from the sea foam where the severed parts fall. Kronos rules over the Titans, swallowing his own children as they are born because he has been warned that one of them will overthrow him, until his wife Rhea hides the infant Zeus on Crete and gives Kronos a stone to swallow instead. Zeus grows up, forces Kronos to disgorge his siblings, and leads them in the Titanomachy, a ten-year war against Kronos and most of the Titans, won partly with the help of the Cyclopes' thunderbolts and the Hecatoncheires' strength. Zeus, Poseidon, and Hades then divide the cosmos by lot: sky, sea, and the underworld, while the earth and Olympus remain common ground. The Olympians establish their court on Mount Olympus and govern gods and mortals together, with Zeus as the acknowledged head of a family that is also a hierarchy of political power.

Mythological Timeline

Ancient authors did not treat these events as pure fiction set outside time; they were arranged, loosely, into a continuous past. The mythological sequence runs from primordial creation, through the age of the Titans and the Titanomachy, into the early rule of the Olympians and a set of divine scandals and unions that produce the next generation of gods and demigods. This is followed by the age of heroes proper: Perseus and the founding of Mycenae, the generation of the Argonauts under Jason, the labors of Heracles, and Theseus's exploits at Athens, all understood as happening a few generations before the Trojan War. The war itself, and the long return journeys afterward (most famously Odysseus's), mark the effective end of the heroic age in most tellings, after which the stories shift from myth toward legendary early history. In terms of when these stories were actually written down, Homer's Iliad and Odyssey and Hesiod's Theogony and Works and Days, composed roughly in the 8th century BCE, are the earliest surviving sources, though they clearly draw on a much older oral tradition; the version of the pantheon and its genealogy used across this site follows Hesiod's Theogony as its baseline, since it is the earliest connected account that survives.

Notable Creatures

What is the difference between a Titan and an Olympian?

Titans are the generation of gods before the Olympians: the children of Gaia and Uranus, twelve in total, who ruled the cosmos under Kronos before Zeus overthrew them. Olympians are the gods who fought on Zeus's side in that war and rule afterward from Mount Olympus, mostly Kronos and Rhea's own children (Zeus, Hera, Poseidon, Hades, Demeter, Hestia) plus a second generation born to Zeus (Athena, Apollo, Artemis, Ares, Hephaestus, Hermes, Aphrodite, Dionysus). A few figures, like Leto and Themis, are Titans by birth who are still treated as friendly to the Olympian order rather than enemies of it.

Hesiod, Theogony 133-138

Who ruled the world before Zeus?

Kronos, the youngest of the twelve Titans, ruled after castrating his own father Uranus at his mother Gaia's urging. Warned that one of his children would overthrow him just as he had overthrown his own father, Kronos swallowed each of his children by Rhea as soon as they were born, until Rhea hid the infant Zeus and tricked Kronos into swallowing a stone in his place.

Hesiod, Theogony 453-491

What was the Titanomachy?

The Titanomachy was the ten-year war between Zeus and the Olympians on one side and Kronos and most of the Titans on the other, fought for control of the cosmos. Zeus won after freeing the Cyclopes and the hundred-handed Hecatoncheires from imprisonment beneath the earth; the Cyclopes gave him the thunderbolt, and the Hecatoncheires' strength overwhelmed the Titans. The defeated Titans were cast down into Tartarus, and Zeus, Poseidon, and Hades then divided the sky, sea, and underworld between them by lot.

Hesiod, Theogony 617-735

Are the Greek myths one consistent story?

No. Greek mythology was never written down as a single authorized text; it is a set of overlapping oral and literary traditions that often disagree on details, such as where a god was born, how many labors Heracles originally faced, or whether a particular monster had one parent or another. Hesiod's Theogony gives the most complete early genealogy and is used as this site's baseline for family relationships, but later poets, playwrights, and Roman authors regularly introduced their own variations, which this site records rather than silently picks between.

Hesiod, Theogony 1-115

What is the oldest surviving source for Greek mythology?

Homer's Iliad and Odyssey and Hesiod's Theogony and Works and Days, all composed in something close to their surviving form around the 8th century BCE, are the earliest complete Greek texts to survive. They clearly draw on a much older oral storytelling tradition - some episodes and character names are attested even earlier in Mycenaean Linear B tablets - but Homer and Hesiod are the earliest connected narratives available to read today.

Hesiod, Theogony 1-35

Why do the Greek gods behave so much like humans?

Greek religion did not treat its gods as morally perfect; they are immortal and vastly more powerful than mortals, but they get jealous, hold grudges, fall in love, and take sides in mortal conflicts for personal reasons. Scholars generally read this as a feature rather than an embarrassment: the myths use divine jealousy, favoritism, and rivalry to explain real features of the world and of human experience, from the changing seasons to why a particular city favors a particular god, in a way a flawless, distant god could not.

Homer, Iliad 1.1-52

Where Accounts Differ

how far later authors depart from Hesiod's genealogy

Hesiod's Theogony is used as this site's baseline genealogy because it is the earliest complete connected account; later authors frequently vary details, and those variants are recorded on the individual entity pages rather than silently harmonized here.