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

Poseidon was an Isu, the Trident King and Dikastes Basileus of Atlantis. He was the brother of Hades and Zeus, and fathered ten sons: Atlas, Diaprepes, Mestor, Azaes, Ampheres, Gadiros, Elasippos, Mneseas, Evaimon, and Autochthonos.

Atlantis was first ruled by Atlas but Poseidon, seeking power for himself, actually supplanted his own son as the reigning monarch and instead gave all his children the subordinate position of Archon to manage the city's affairs.

Poseidon was revered by the ancient Greeks as the god of the seas, the ocean, horses, and earthquakes. His equivalent in Roman mythology is Neptune.


During the Isu Era, Poseidon ruled the Isu city of Atlantis, where he was known as the Dikastes Basileus. Appaled by the scientific experiments conducted on humans, Poseidon outlawed it in his city.[1]

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]

In 48 BCE, Poseidon was often invoked by Phoxidas during his time sailing the seas with Aya.[3]


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]

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.[4] 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]


During the Peloponnesian War, a simulated version of Poseidon was created by his fellow Isu Aletheia. In the simulation,Poseidon first appeared alongside Hades while Kassandra met him there.[5]





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