mythology in anime

From "Is it Wrong to Pick up Girls in a Dungeon?" to "Campione!" and the famous "fate/" series. There have been various anime that have drawn inspiration from ancient mythologies from around the world. To what extent has ancient mythologies, specifically non-Japanese ones, influenced the production of various anime and manga? Out of the thousands of anime and manga out there, how many have taken influence from these stories. There have even been common rehashings of creatures from legends remade into broad categories or representations of creatures. The first of which comes to mind is the use of "Chimera" to describe various hybrid creatures across shows and very notably in the Fullmetal Alchemist" manga and anime. Exactly how much has modern storytelling taken from stories of millennium past?