Ancient Greek religion
Ancient Greek religion encompasses the collection of beliefs, rituals, and mythology originating in ancient Greece in the form of both popular public religion and cult practices. The application of the modern concept of “religion” to ancient cultures has been questioned as anachronistic. The ancient Greeks did not have a word for 'religion' in the modern sense. Likewise, no Greek writer known to us classifies either the gods or the cult practices into separate 'religions'. Instead, for example, you see Herodotus speak of the Hellenes as having "common shrines of the gods and sacrifices, and the same kinds of customs."