Poseidon (Greek: Ποσειδῶν, Poseidōn) is one of the twelve Olympian deities in the ancient Greek religion and mythology, and is the god of the sea, earthquakes, storms, and horses. In Roman mythology, he is known as Neptune (Latin: Neptunus), and in Etruscan mythology, he is known as Netun. Poseidon is often depicted with a trident, which he uses to create storms and earthquakes. He is also associated with the horse, as he is said to have created the first horse. In Hebrew, Poseidon is referred to as פוסידון (Posidon). Poseidon was a major figure in Greek mythology, and his worship was widespread across the Greek world. He was often invoked by sailors as a protector and was also associated with the foundation of cities and the establishment of laws. Poseidon's domain over the sea made him a significant figure in ancient Greek culture, which was heavily dependent on maritime trade and travel.