The Greek mythology is the body of myths originally told by the ancient Greeks, and a genre of Ancient Greek folklore. These stories concern the origin and nature of the world, the lives and activities of deities, heroes, mythological creatures, and the origins and significance of the ancient Greeks own cult and ritual practices.
Greek mythology is known today primarily from Greek literature and representations on visual media dating from the Geometric period from c. 900 BC to c. 800 BC onward.
In fact, literary and archaeological sources integrate, sometimes mutually supportive and sometimes in conflict; however, in many cases, the existence of this corpus of data is a strong indication that many elements of Greek mythology have strong factual and historical roots.
Greek mythology has changed ovee time to accommodate the evolution of their culture, of which mythology, both overtly and in its unspoken assumptions, is an index of the changes.