In Greece they had many things they believe in. They believe that the owl is an ancient symbol of wisdom. They even put it on their coins as early as 520 BC.
They also believed in the blue eye. This round blue piece of glass is said to keep away the evil eye and envious people. An example of the evil eye is someone saying you look nice and then you spilling something all over you.
Greeks believed minoan beliefs, central Asian gods, and West Indian ideas. People in Ancient Greece believed in invisible gods that were powerful and could control what happened to you.