Who was Poseidon?

Poseidon was an important god. He was one of the 12 Olympians, who made up the council of the gods. He kept a home on Mount Olympus that he used when he had to attend a meeting of the council. But his true home was his palace under the sea. It was a magical place, with white sand and jewels and shells and fish in every color of the rainbow. Glow worms acted as soft lighting throughout the palace. As restless as he was, he calmed each time he came home to his gentle wife and his peaceful palace under the sea.  

Poseidon, Athena, and Athens

Perseus, Andromeda, and the sea god, Poseidon