The Thesmophoria was a festival for women only that was dedicated to Demeter. The festival was celebrated all over Greece. Women would sacrifice piglets to the goddess. On the second day of the festival they would fast, and on the last day they would have a large feast.
Poseidon was the god of the sea and horses. He was the brother of Zeus. He was known for his bad temper and was greatly feared because of his ability to cause earthquakes. He was believed to be able to make fresh water gush forth from the earth.
The trident, a three-pronged spear.
White horses and a golden chariot.
Sometimes shown with a fish or a dolphin in his hand.