Dionysus in the context of "Orpheus"

Religious practices in ancient Greece encompassed a collection of beliefs, rituals, and mythology, 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 is known to have classified either the gods or the cult practices into separate 'religions'. Instead, for example, Herodotus speaks of the Hellenes as having "common shrines of the gods and sacrifices, and the same kinds of customs".

Most ancient Greeks recognized the twelve major Olympian gods and goddesses—Zeus, Hera, Poseidon, Demeter, Athena, Ares, Aphrodite, Apollo, Artemis, Hephaestus, Hermes, and either Hestia or Dionysus—although philosophies such as Stoicism and some forms of Platonism used language that seems to assume a single transcendent deity. The worship of these deities, and several others, was found across the Greek world, though they often have different epithets that distinguished aspects of the deity, and often reflect the absorption of other local deities into the pan-Hellenic scheme.

In ancient Greece, deities were regarded as immortal, anthropomorphic, and powerful. They were conceived of as individual persons, rather than abstract concepts or notions, and were described as being similar to humans in appearance, albeit larger and more beautiful. The emotions and actions of deities were largely the same as those of humans; they frequently engaged in sexual activity, and were jealous and amoral. Deities were considered far more knowledgeable than humans, and it was believed that they conversed in a language of their own. Their immortality, the defining marker of their godhood, meant that they ceased aging after growing to a certain point. In place of blood, their veins flowed with ichor, a substance which was a product of their diet, and conferred upon them their immortality. Divine power allowed the gods to intervene in mortal affairs in various ways: they could cause natural events such as rain, wind, the growing of crops, or epidemics, and were able to dictate the outcomes of complex human events, such as battles or political situations.

As ancient Greek religion was polytheistic, a multiplicity of gods were venerated by the same groups and individuals. The identity of a deity was demarcated primarily by their name, which could be accompanied by an epithet (a title or surname); religious epithets could refer to specific functions of a god, to connections with other deities, or to a divinity's local forms. The Greeks honoured the gods by means of worship, as they believed deities were capable of bringing to their lives positive outcomes outside their own control. Greek cult, or religious practice, consisted of activities such sacrifices, prayers, libations, festivals, and the building of temples. By the 8th century BC, most deities were honoured in sanctuaries (temenē), sacred areas which often included a temple and dining room, and were typically dedicated to a single deity. Aspects of a god's cult such as the kinds of sacrifices made to them and the placement of their sanctuaries contributed to the distinct conception worshippers had of them.

Thebes (/ˈθiːbz/ THEEBZ; Greek: Θήβα, Thíva [ˈθiva]; Ancient Greek: Θῆβαι, Thêbai [tʰɛ̂ːbai̯]) is a city in Boeotia, Central Greece, and is one of the oldest continuously inhabited cities in the world. It is the largest city in Boeotia and a major center for the area along with Livadeia and Tanagra.

It played an important role in Greek myths, as the site of the stories of Cadmus, Oedipus, Dionysus, Heracles and others. One myth had the city founded by Agenor, which gave rise to the (now somewhat obscure) name "Agenorids" to denote Thebans. Archaeological excavations in and around Thebes have revealed a Mycenaean settlement and clay tablets written in the Linear B script, indicating the importance of the site in the Bronze Age.

Zeus (/zjuːs/, Ancient Greek: Ζεύς) is the chief deity of the Greek pantheon. He is a sky and thunder god in ancient Greek religion and mythology, who rules as king of the gods on Mount Olympus.

Zeus is the child of Cronus and Rhea, the youngest of his siblings to be born, though sometimes reckoned the eldest as the others required disgorging from Cronus's stomach. In most traditions, he is married to Hera, by whom he is usually said to have fathered Ares, Eileithyia, Hebe, and Hephaestus. At the oracle of Dodona, his consort was said to be Dione, by whom the Iliad states that he fathered Aphrodite. According to the Theogony, Zeus's first wife was Metis, by whom he had Athena. Zeus was also infamous for his erotic escapades. These resulted in many divine and heroic offspring, including Apollo, Artemis, Hermes, Persephone, Dionysus, Perseus, Heracles, Helen of Troy, Minos, and the Muses.

In ancient Greek religion and mythology, the twelve Olympians are the major deities of the Greek pantheon, commonly considered to be Zeus, Poseidon, Hera, Demeter, Aphrodite, Athena, Artemis, Apollo, Ares, Hephaestus, Hermes, and either Hestia or Dionysus. They were called Olympians because, according to tradition, they resided on Mount Olympus.

Besides the twelve Olympians, there were many other cultic groupings of twelve gods.

The religious beliefs and practices of Mycenaean Greece (c. 1600–1100 BC) are difficult to discern due to limited archeological, iconographical, and material records. Existing evidence suggests that the Mycenaean religion was the mother of the Greek religion, sharing many divinities later found in classical Greece (510–323 BC), including Zeus, Poseidon, and Dionysus. Several Mycenaean religious customs, such as animal sacrifices and votive offerings, survived into the Greek period, as did terms and concepts such as theos (deity), hieros (holy man), nawos (temple), and temenos (land cut off and assigned for communal purposes).

John Chadwick noted that at least six centuries lie between the earliest presence of Proto-Greek speakers in Hellas and the earliest inscriptions in the Mycenaean script known as Linear B, during which concepts and practices will have fused with indigenous pre-Greek beliefs, and—if cultural influences in material culture reflect influences in religious beliefs—with Minoan religion. As for these texts, the few lists of offerings that give names of gods as recipients of goods reveal little about religious practices, and there is no other surviving literature.

Greek tragedy (Ancient Greek: τραγῳδία, romanized: tragōidía) is one of the three principal theatrical genres from Ancient Greece and Greek-inhabited Anatolia, along with comedy and the satyr play. It reached its most significant form in Athens in the 5th century BC, the works of which are sometimes called Attic tragedy.

Greek tragedy is widely believed to be an extension of the ancient rites carried out in honor of Dionysus, the god of wine and theatre, and it greatly influenced the theatre of Ancient Rome and the Renaissance. Tragic plots were most often based upon myths from the oral traditions of archaic epics. In tragic theatre, however, these narratives were presented by actors. The most acclaimed Greek tragedians are Aeschylus, Sophocles, and Euripides. These tragedians often explored many themes of human nature, mainly as a way of connecting with the audience but also as way of bringing the audience into the play.