Greek religion, or rather, Greek religions, is the religion practiced in ancient Greece, and the practical counterpart of Greek mythology. In a wider sense, it was the faith of Rome and the other European cultures of classical antiquity, and the polytheism most people have in mind when they think of paganism. In the modern era, the closest candidate for the "Greek religion" would be the Greek Orthodox Church, which has been part of Greek culture for more than a millenium. It is, of course, a Christian church whose beliefs are thus very different from the "Greek religion" described in this article.

See also: Greek mythology, Roman religion, Roman mythology, paganism

Table of contents
1 Overview
2 Worship
3 Theology
4 Mystery religions
5 Extinction; revival

Overview

It is perhaps misleading to speak of "Greek religion" as a unified system of dogma or ritual; perhaps the most conspicuous aspect of the religions practised in the Greek city states is their variety. Different cities worshipped different deities; Athens had Athena; Sparta, Artemis Corinth was a center for the worship of Aphrodite; Delphi and Delos had Apollo; Olympia had Zeus, and so on down to the smaller cities and towns. Identity of names was not even a guarantee of a similar cultus; the Greeks themselves were well aware that the Artemis worshipped at Sparta, the virgin huntress, was a very different deity from the Artemis who was a many-breasted fertility goddess at Ephesus. When literary works such as the Iliad had conflicts among the gods because their followers were at war on earth, these conflicts were a celestial reflection of the earthly pattern of local deities. Eventually, the worship of major deities spread from one locality to another, and most larger cities boasted temples to several major gods; the identification of different gods with different places remained strong to the end.

The variety in Greek religion is also caused by the long history of Greece. Greek religion spans a period from Minoan and Mycenean periods to the days of Hellenistic Greece and its ultimate conquest by the Roman Empire. Religious ideas continued to develop over this time; by the time of the earliest major monument of Greek literature, the Iliad attributed to Homer, a consensus had already developed about who the major Olympian gods were. Still, changes to the canon remained possible; the Iliad seems to have been unaware of Dionysus, a god whose worship apparently spread after it was written, and who became important enough to be named one of the twelve chief Olympian gods.

In addition to the local cults of major gods, various places like crossroads and sacred grovess had their own tutelary spirits. There were often altars erected outside the precincts of the temples. Shrines like hermai were erected outside the temples as well. Heroes, in the original sense, were demigods or deified humans who were part of local legendary history; they too had local cults, and often served as oracles for purposes of divination. What religion was, first and foremost, was traditional; the idea of novelty or innovation in worship was out of the question, almost by definition. Religion was the collection of local practices to honour the local gods.

Worship

The most widespread public act of worship in ancient Greece was sacrifice, especially the blood sacrifice of animals. The temples of the Greek religion generally were not public gathering places where people gathered socially for collective indoor prayer; most temples were little more than boxes that held a cult idol of the deity. Rather, the temples were part slaughterhouse and part barbecue; oxen, sheep, horses, swine, dogs, various birds, and almost every kind of beast, be it fur, fish, or fowl, were offered as sacrificial victims to one deity or another, again depending chiefly on local custom. When we are told in studies of mythology that "horses are sacred to Poseidon" or roosters to Hermes, what this meant first and foremost was that these animals were customarily offered as sacrifices to those gods. Most sacrificial victims were food animals; for these, the usual practice was to offer the god the blood, bones, and hide of the victim, while the worshippers kept and ate the rest.

The Roman formula expressed the attitude of worshippers to their gods in the formula do ut des; I give sacrifices, so that the god will reward me in return. Public worship was aimed at pleasing the gods so that the gods would send rain, good harvest, military victories, and other public blessings. Private sacrifice was offered for personal goals. Prayer was highly formulaic and ritualized. Most places did not have professional full-time clergy; priests were local officials whose priesthoods were not full time jobs. Major religious sites such as the oracles of pilgrimage brought in enough spiritual tourism to need a full time clerical staff.

Theology

Theology did not come naturally to a faith this diverse and essentially local. At the time of the Homeric epics, the Greeks were familiar enough with their neighbours to be aware that the next city-state over worshipped a different subset of gods. The Homeric Hymns tell us something about the belief and worship of various gods, but apart from the (often variable) family trees of the gods, there is little attempt to provide an overarching system of belief.

One of the earliest attempts to give a theology to the Greek religion is found in the works of the poet Hesiod, whose Theogony provides a creation myth focusing on deified abstractions like Night and Time. The decision as to which deities were considered major enough to number among the Twelve Olympians who were the chief gods of the pantheon was no doubt a political decision, at least in part. Because most of the gods were originally local, and inconsistent stories were told of them from one locality to another, the faith of the ancient Greeks resisted systematization, at least at first. Socrates and other philosophers were accused of atheism by the populists of Athens when they pointed out the difficulties in accepting the received ideas about the gods as a whole. Yet Socrates' view of the gods was ultimately to triumph; as time went on, the traditional piety of the sacrificial rites tended to be dismissed as a sort of folklore, while those who were philosophically minded tended to believe in abstract, remote, and genteel gods who vaguely acted to uphold social norms and public virtues.

The virtues fostered by Greek religion were chiefly respect for the gods, who were majestic (sebastos, σεβαστος) and sublime (semnos, σεμνος) Given the variety of rituals and traditions in the Greek religious state, the believer was obliged to hold the faiths of his neighbours in a similar regard to those of his own city. Those who broke the boundaries of the sacred were considered to be rendered impure thereby. These rules held even in the absence of other circumstances; for example, Orestes was pursued by the Furies for the murder of his mother Clytemnestra to avenge her murder of his father Agamemnon, even though Orestes slew him in what he considered to be his duty. Still, the sacred boundaries and laws must be upheld, and Orestes was unable to win free from the Furies until he was absolved by Athena and performed a quest imposed by Apollo.

Late in the history of classical religion, the Neo-Platonists and the Roman emperor Julian attempted to organize classical paganism into a systematic belief system, which they gave the name of HellÍnismos to: the belief system of the Greeks. Their failure to do so stemmed from the essentially local and traditional nature of the religion they sought to protect. Since classical paganism even at that late date was chiefly a matter of following a local tradition, rather than commitment to an overarching belief system and body of doctrine, their rear-guard attempt to create an overarching structure or body of doctrine was fatally flawed.

Mystery religions

Those whose spiritual leanings were not satisfied by the public cult of the gods could turn to various mystery religions. Here, they could find religious consolations that the traditional cultus could not provide: a systematic religious doctrine, an attractive afterlife, a communal worship, and a band of spiritual fellowship. Some of these mysteries, like the mysteries of Eleusis and Samothrace, were ancient and local. Others were spread from place to place, like the mysteries of Dionysus. During the Hellenistic period and the Roman Empire exotic mystery religions like those of Osiris and Mithras became widespread.

Extinction; revival

With the onset of Christianity, the Greek religions died out. (The vast majority of modern Greeks are Greek Orthodox.)

Many neo-pagan religious paths, such as Wicca, use aspects of ancient Greek religions in their practice; Greek reconstructionism focuses exclusively thereon.