Poseidon: God of Sea,Earthquakes and Horses

Poseidon is god of the Sea and other waters; of earthquakes; and of horses.In pre-Olympian Bronze Age Greece, he was venerated as a chief deity at Pylos and Thebes. His Roman equivalent is Neptune.Poseidon was protector of seafarers, and of many Hellenic cities and colonies. Poseidon supports the Greeks against the Trojans during the Trojan War. In the Odyssey, during the sea-voyage from Troy back home to Ithaca, the Greek hero Odysseus provokes Poseidon's fury by blinding his son, the Cyclops Polyphemus, resulting in Poseidon punishing him with storms, the complete loss of his ship and companions, and a ten-year delay. 

He is distinguished from Pontus, the personification of the sea and the oldest Greek divinity of the waters. The name Poseidon means either “husband of the earth” or “lord of the earth.” Traditionally, he was a son of Cronus and of Cronus’s sister and consort Rhea, a fertility goddess. Poseidon was a brother of Zeus, the sky god and chief deity of ancient Greece, and of Hades, god of the underworld. When the three brothers deposed their father, the kingdom of the sea fell by lot to Poseidon. His weapon and main symbol was the trident, perhaps once a fish spear. As the god of earthquakes, Poseidon was also connected to dry land, and many of his oldest places of worship in Greece were inland, though these were sometimes centered on pools and streams or otherwise associated with water. In this aspect, he was known as enosichthon and ennosigaios (“earth-shaker”) and was worshiped as asphalios (“stabilizer”). As the god of horses, Poseidon is thought likely to have been introduced to Greece by the earliest Hellenes, who also introduced the first horses to the country about the 2nd century BCE. Poseidon himself fathered many horses, best known of which was the winged horse Pegasus by the Gorgon Medusa.Poseidon came into conflict with a variety of figures in land disputes. Notable among these was a contest for sovereignty over Attica, which he lost to the goddess Athena. Despite losing, Poseidon was also worshiped there, particularly at Colonus (as hippios, “of horses”).

He was the father of Pelias and Neleus by Tyro, the daughter of Salmoneus, and thus became the divine ancestor of the royal families of Thessaly and Messenia. Many of his sons became rulers in other parts of the ancient Greek world. Otherwise he had many monstrous offspring, including giants and savage creatures, such as Orion, Antaeus, and Polyphemus. Progenitor of many, with several consorts, Poseidon also was married to the Oceanid Amphitrite, with whom he also had multiple offspring, including the sea creature Triton.

Worship of Poseidon

Poseidon was a major civic god of several cities: in Athens, he was second only to Athena in importance. Athena became the patron goddess of the city of Athens after a competition with Poseidon. Yet Poseidon remained a numinous presence on the Acropolis in the form of his surrogate, Erechtheus. At the dissolution festival at the end of the year in the Athenian calendar, the Skira, the priests of Athena and the priest of Poseidon would process under canopies to Eleusis. They agreed that each would give the Athenians one gift and the Athenians would choose whichever gift they preferred. Poseidon struck the ground with his trident and a spring sprang up; the water was salty and not very useful, whereas Athena offered them an olive tree.

The Athenians or their king, Cecrops, accepted the olive tree and along with it Athena as their patron, for the olive tree brought wood, oil and food. After the fight, infuriated at his loss, Poseidon sent a monstrous flood to the Attic Plain, to punish the Athenians for not choosing him. The depression made by Poseidon's trident and filled with salt water was surrounded by the northern hall of the Erechtheum, remaining open to the air. 

Poseidon was seen as creating new islands and offering calm seas. When offended or ignored, he supposedly struck the ground with his trident and caused chaotic springs, earthquakes, drownings and shipwrecks. Sailors prayed to Poseidon for a safe voyage, sometimes drowning horses as a sacrifice. According to Pausanias, Poseidon was one of the caretakers of the oracle at Delphi before Olympian Apollo took it over. Apollo and Poseidon worked closely in many realms: in colonization, for example, Delphic Apollo provided the authorization to go out and settle, while Poseidon watched over the colonists on their way, and provided the lustral water for the foundation-sacrifice. 

Walls of Troy

Poseidon and Apollo, having offended Zeus by their rebellion in Hera's scheme, were temporarily stripped of their divine authority and sent to serve King Laomedon of Troy. He had them build huge walls around the city and promised to reward them well, a promise he then refused to fulfill. In vengeance, before the Trojan War, Poseidon sent a sea monster to attack Troy. The monster was later killed by Heracles.

Consorts and children

                           

Poseidon was said to have had many lovers of both sexes . His consort was Amphitrite, a nymph and ancient sea-goddess, daughter of Nereus and Doris. Together they had a son named Triton, a merman.

Poseidon was the father of many heroes. He is thought to have fathered the famed Theseus.

A mortal woman named Tyro was married to Cretheus (with whom she had one son, Aeson), but loved Enipeus, a river god. She pursued Enipeus, who refused her advances. One day, Poseidon, filled with lust for Tyro, disguised himself as Enipeus, and from their union were born the heroes Pelias and Neleus, twin boys. 

Poseidon also had an affair with Alope, his granddaughter through Cercyon, his son and King of Eleusis. Cercyon had his daughter buried alive but Poseidon turned her into the spring, Alope, near Eleusis.

Poseidon rescued Amymone from a lecherous satyr and then fathered a child, Nauplius, by her.

A mortal woman named Cleito once lived on an isolated island; Poseidon fell in love with the human mortal and created a dwelling sanctuary at the top of a hill near the middle of the island and surrounded the dwelling with rings of water and land to protect her. She gave birth to five sets of twin boys; the firstborn, Atlas, became the first ruler of Atlantis.

In an archaic myth, Poseidon once pursued Demeter. She spurned his advances, turning herself into a mare so that she could hide in a herd of horses; he saw through the deception and became a stallion and captured her. Their child was a horse, Arion, which was capable of human speech. 

Poseidon also raped Medusa on the floor of a temple to Athena. Medusa was then changed into a monster by Athena.When she was later beheaded by the hero Perseus, Chrysaor and Pegasus emerged from her neck.

His other children include Polyphemus (the cyclops) and, finally, Alebion and Bergion and Otos and Ephialtae (the giants).