Introduction to the Statue of Poseidon: In the center of the fountain stands a statue of Poseidon, which is pulled by two horses and is carved by the sculptor Pie-tro Bracci. Nipley, the god of the sea, has an unruly and contemptuous attitude and wrinkled clothes, just like reality; there are two horses at the feet of the god of the sea, being pulled by two men with fish tails, symbolizing the calm and turbulent rivers respectively. The one on the left One is untamed, the one on the right is docile and easy-going, pulling the background like a triumphal arch in two directions.