Ancient Greek theology was polytheistic, based on the assumption that there were many gods and goddesses, as well as a range of lesser supernatural beings of various types.
There was a hierarchy of deities, with Zeus, the king of the gods, having a level of control over all the others, although he was not almighty.
Documentary on Religion in Ancient Greece by History House YTTV, Footage taken from Assassin's Creed Odyssey:
