Poseidon is the ancient Greek god of the sea, earthquakes, and horses, one of the twelve Olympian deities who ruled from Mount Olympus. His story is a central thread in Greek mythology, told across Homer’s epics, Hesiod’s Theogony, and countless later works, where he appears as a powerful, moody, and often vengeful figure whose domain covered the waters that surrounded the Greek world.
Origins and Family
Poseidon was the son of the Titans Cronus and Rhea, making him the brother of Zeus, Hades, Hera, Demeter, and Hestia. According to Hesiod’s Theogony, Cronus swallowed each of his children at birth to prevent a prophecy that one would overthrow him. Poseidon was devoured like his siblings, but when Zeus forced Cronus to disgorge them, Poseidon emerged fully grown and joined the war against the Titans. After the Olympians won, the three brothers drew lots to divide the cosmos: Zeus received the sky, Hades the underworld, and Poseidon the sea. The earth and Mount Olympus remained common ground, which is why Poseidon could appear among the other gods.
His consorts and offspring are numerous and vary by source. His wife was Amphitrite, a sea goddess and daughter of the old sea god Nereus, with whom he fathered Triton, a merman who blew a conch shell to calm or stir the waves. Poseidon also had many other children with mortals and goddesses, including the hero Theseus (in most accounts), the cyclops Polyphemus (in Homer’s Odyssey), the winged horse Pegasus (with Medusa, after her death), and the hunter Orion. His paternity of some figures, like Theseus, was disputed even in antiquity, with different cities claiming different fathers.
Poseidon’s Role and Powers
As god of the sea, Poseidon controlled storms, waves, and safe passage for sailors. Greeks who depended on fishing and trade prayed to him for calm waters and favorable winds, but they also feared his wrath. He was called “Earth-Shaker” because he could cause earthquakes by striking the ground with his trident, a three-pronged spear that became his signature weapon. In art, he is usually shown as a bearded, muscular man holding the trident, often riding a chariot pulled by horses or sea creatures.
His powers extended beyond water. Poseidon was also associated with horses, and myth credits him with creating the first horse, either by striking the ground with his trident or by shaping it from sea foam. This link made him a patron of horsemanship and chariot racing, and he had sanctuaries dedicated to both sea and horse worship, such as the one at the Isthmus of Corinth, where the Isthmian Games (which included equestrian events) were held in his honor.
The Contest for Athens
One of the most famous stories about Poseidon is his rivalry with Athena for the patronage of the city of Athens. According to tradition, the two gods competed to give the city the best gift. Poseidon struck the Acropolis with his trident and produced a saltwater spring (or, in some versions, a horse). Athena offered an olive tree, which provided wood, oil, and food. The Athenians judged her gift more useful, and the city was named after her. Poseidon, enraged by the loss, flooded the surrounding plain in a fit of anger. This myth explained both the city’s name and the presence of saltwater springs near the Acropolis, which were real and visible in antiquity.
Poseidon in Homer’s Epics
Poseidon plays a major role in Homer’s Odyssey as the primary antagonist of the hero Odysseus. After Odysseus blinds Polyphemus, the cyclops who is Poseidon’s son, the god punishes him by making his journey home extremely difficult. Poseidon sends storms, wrecks his raft, and delays him for years, though he never kills Odysseus outright because that would defy the other gods. In the Iliad, Poseidon supports the Greeks against the Trojans, but he also quarrels with Zeus and other gods, showing his independent and sometimes defiant nature. Homer portrays him as a powerful but not omnipotent deity, subject to the will of Zeus and the collective decisions of the Olympian council.
Worship and Sanctuaries
Poseidon was widely worshipped across the Greek world, with major sanctuaries at the Isthmus of Corinth, Cape Sounion (where the Temple of Poseidon still stands on a cliff overlooking the Aegean), and on the island of Helike in Achaea. The Isthmian Games, held every two years, were dedicated to him and included athletic and equestrian competitions. Sailors and fishermen made offerings to him before voyages, and cities on the coast often had altars to him. In some regions, he was also honored as a god of fresh water and springs, since Greeks believed that underground water was connected to the sea.
His cult sometimes included horse sacrifices, which were rare in Greek religion, reflecting his unique association with both the sea and horses. The historian Pausanias, writing in the 2nd century CE, describes several sanctuaries and rituals dedicated to Poseidon, including one where horses were thrown into the sea as offerings.
Common Misconceptions
One common misconception is that Poseidon was always hostile to humans. In fact, he was also a protector of sailors and cities, and many myths show him helping heroes. For example, he aided the Argonauts in their quest for the Golden Fleece by calming storms, and he helped the Greeks during the Trojan War (though he also turned against them later). Another misconception is that Poseidon and the Roman god Neptune are identical. While the Romans adopted many Greek myths and equated Neptune with Poseidon, Neptune originally had his own distinct character as a god of fresh water and was later merged with Poseidon’s sea attributes. Roman writers like Ovid and Virgil retold the Greek stories, but the Roman religious context differed.
People also often ask whether Poseidon was more powerful than Zeus. In Greek mythology, Zeus is explicitly the king of the gods and the most powerful, with Poseidon and Hades subordinate to him. Homer’s Iliad has Poseidon himself acknowledge Zeus’s superiority, though he resents it. So while Poseidon was immensely powerful, he was not equal to Zeus.
Frequently Asked Questions
Who were Poseidon’s parents?
Poseidon’s parents were the Titans Cronus and Rhea. Cronus swallowed him at birth, but he was later freed by Zeus, as told in Hesiod’s Theogony.
What is Poseidon’s symbol?
His main symbol is the trident, a three-pronged spear. He is also associated with horses, dolphins, and bulls, and he often appears with these animals in art and myth.
Why did Poseidon curse Odysseus?
Odysseus blinded Polyphemus, the cyclops son of Poseidon, in Homer’s Odyssey. In revenge, Poseidon made his voyage home long and dangerous, but he did not kill him because Zeus forbade it.
Did Poseidon create horses?
Yes, in several myths Poseidon is said to have created the first horse, either by striking the ground with his trident or by shaping it from sea foam. This is why he was worshipped as a god of horses.
How is Poseidon different from Neptune?
Neptune was originally a Roman god of fresh water, but the Romans later identified him with Poseidon and adopted many of his myths. The two are often treated as the same, but their original cults differed.
Was Poseidon married?
Yes, Poseidon was married to Amphitrite, a sea goddess. Together they had a son, Triton, who is often depicted as a merman. Poseidon also had many other lovers and children, both divine and mortal.
Related
- Hera Domain in Mythology: Queen of the Gods
- Zeus and Hera: Myth, Marriage, and Conflict
- Zeus Domain Facts: Sky, Thunder & More
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