Other
Poseidon: God of the Sea
The many mentions of Poseidon (Roman name "Neptune") in The Iliad and The Odyssey are detailed here.
Encyclopedia Mythica
Encyclopedia Mythica: Poseidon
The god of the sea and his famous rivalry with Athena for the favor of the city of Athens is explained in this article. (Roman name "Neptune.")
Curated OER
Mythweb: Greek Mythology: Gods: Poseidon: With Trident
Watercolor image of the god Poseidon holding a trident.