Poseidon

The ship Poseidon could still punish

Odysseus is already ashore on Ithaca when the Phaeacian ship turns for home. Its crew has carried him safely across the sea, ending the journey Poseidon has spent years prolonging. The god waits off Scheria until the vessel draws close to land, strikes it with the flat of his hand and fixes it beneath the water as stone.

Before acting, Poseidon consults Zeus. He asks what he may do to people who have ignored his anger, and Zeus tells him how to stop their ship within sight of the city. Odysseus is beyond Poseidon’s reach by then. The sailors who helped him pay instead.

How the sea became his share

Poseidon’s claim to the sea begins after the war against the Titans. In Apollodorus, the Cyclopes arm the three brothers: Zeus receives thunder and the thunderbolt, Hades a helmet and Poseidon a trident. When victory is won, they draw lots. The sky falls to Zeus, the underworld to Hades and the sea to Poseidon.

The division sounds clear until Zeus gives an order outside his allotted sky. During the Trojan War, Iris tells Poseidon to leave the fighting. He refuses at first. The earth and Olympus remain common, he says, and the three brothers hold their separate realms by chance. Zeus may be stronger, but Poseidon calls himself a god of equal honour.

Iris does not argue about strength or ownership. She asks whether Poseidon truly wants her to carry that answer back, then reminds him that the Erinyes attend the elder-born. Poseidon withdraws to the sea.

Which brother had seniority

The poets leave Iris’s warning unstable. Elsewhere in the Iliad, Zeus and Poseidon have the same parents, but Zeus is called the elder-born and wiser. Hesiod’s Theogony names the children of Cronus and Rhea in a different order: Hestia, Demeter, Hera, Hades, Poseidon and finally Zeus.

Hesiod does not turn that list into a contest over seniority, and the realms are allotted rather than inherited. Poseidon’s speech establishes the limit more securely than the genealogy does: the lot gives him a domain equal in dignity to his brothers’ domains, but it does not give him the final word among the gods.

What the earth-shaker governed

The sea was only one expression of Poseidon’s force. Homer repeatedly calls him the earth-shaker and earth-enfolder. The epithets Enosichthon and Gaieochos carry the same powers, while Hippios connects him to horses. In the surviving stories, his trident marks rock, opens salt water on a hill and shakes the ground.

Worship met that range of power on land. When Telemachus reaches Pylos in the Odyssey, nine companies of 500 people sit on the beach, with nine bulls ready in each company for Poseidon. At Cape Sounion, his sanctuary occupied the highest ground of the fortified headland. The marble temple now standing there was built around 444–440 BC over an earlier limestone temple.

Why Odysseus comes home

Zeus explains the outcome of the Odyssey near its beginning. Poseidon is angry because Odysseus blinded Polyphemus, the Cyclops born to Poseidon and the nymph Thoosa. Yet the god does not kill Odysseus. He makes him wander, and Zeus says that Poseidon cannot contend alone against all the immortals.

Delay is still a formidable weapon. Poseidon keeps Ithaca out of reach until the other gods secure Odysseus’s return. Once the Phaeacians complete that return, he can punish their ship, but he cannot place its passenger back aboard.

What remained after Athena won

The contest for Attica follows the same pattern. Poseidon arrives first, strikes the centre of the Acropolis with his trident and produces the salt water called Erechtheis. Athena comes later, plants an olive and brings Cecrops as her witness. In Apollodorus, the twelve gods award the country to her. Poseidon floods the Thriasian plain, but the city keeps Athena’s name.

Athens did not erase the defeated god. The Parthenon’s west pediment showed the contest, and fragments attributed to its Poseidon survive in the Acropolis Museum. Inside the Erechtheum, Pausanias saw an altar to Poseidon, a trident mark on the rock and sea water held in a cistern. When the south wind blew, he wrote, the water sounded like waves.