Poseidon was the brother of Zeus and Hades, and one of the primary deities in the Olympian pantheon. He had a place with the other gods atop Mt. Olympus, but he mainly stayed within his domain in the ...

People believed patron gods protected them from harm. A Greek coin showing Pegasus and the goddess, Athena. The Greeks thought the gods lived high above Mount Olympus, in a palace in the clouds.