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"Poseidon, god of the ocean. Thank you for watching over the Adrestia."

Poseidon was an Isu revered by the Greek god of the seas, the ocean, horses, and earthquakes. He was the brother of Hades.

His equivalent in Roman mythology is Neptune.


Poseidon was rumored to have fathered Byzas with the nymph Keroessa. Byzas later became the founder of Byzantium, which was renamed sometime after as Constantinople.[1] While Amphitrite, wife of Poseidon and queen of the sea, was said to have birthed his other son Triton, who had a conch shell to control the sea.[2]

According to stories told on Naxos Island, a mortal woman by the name of Iphimedeia fell in love with Poseidon, and was in the habit of walking the shores, gathering sea water into her lap. Later, she gave birth to twin giant sons, the Aloadai Otos and Ephialtes.[2]

Orion the Giant was also a son of Poseidon, allegedly born in Boeotia.[2]


According to the story of the death of Hippolytos, the hero Theseus' son, Poseidon played a part in it. Angered by what his wife Phaidra claimed Hippolytos to have done, Theseus invoked the god to kill Hippolytos. Poseidon summoned a sea monster, and Hippolytos died within the Sinkholes of Herakles in Argolis, in a chariot accident.[2]

Influence and legacy

Classical antiquity

During the Peloponnesian War, the Spartan misthios Kassandra obtained Poseidon's Trident from within the ruins of a temple dedicated to him on a small Samian island. This trident was a weapon attributed to Poseidon that allowed the wielder to breathe underwater and was said to "control the seas".[2]

The Areopagus in Athens was said to have been the place where the god of war Ares was judged for killing one of Poseidon's sons.[2]

Throughout the Greek world, there were numerous temples dedicated to the god, and some like the Erechtheion on the Akropolis Sanctuary in Athens was dedicated many gods at the same time. There was also the region of Korinthia dedicated to Poseidon: the Isthmus of Poseidon, housing the Sanctuary of Isthmia, home to the Isthmian Games.[2]

A simulation of Poseidon was present in the Isu Aletheia's simulation of Hades, and Kassandra met him there.[3]

In 48 BCE, Poseidon was often invoked by Phoxidas during his time sailing the seas with Aya.[4]





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