Ancient Greece was located in southeastern Europe surrounded by water and mountains. Its climate was moderated by the Mediterranean Sea. Greek civilization began around 2000 BC and was made up of independent city-states like Athens and Sparta. Greeks practiced polytheistic religion and made sacrifices to gods like Zeus. They farmed olives, grapes, and barley and ate bread, olive oil, and wine. Greek society was patriarchal with women confined to domestic roles and having little freedom. The Olympics began in 776 BC and helped unite the Greeks culturally.