Certain elements of the cult of Dionysos and Semele came from the Phrygians. These were modified, expanded and elaborated by the Ionian Greek invaders and colonists. Herodotus, who gives the account of Cadmus, estimates that Semele lived sixteen hundred years before his time, or around 2000 BCE In Rome, the goddess Stimula was identified as Semele.
According to some linguists the name "Semele" is Thraco-Phrygian, derived from a PIE root meaning "earth". Julius Pokorny reconstructs her name from the PIE root *dgem meaning "earth" and relates it with Thracian Zemele, "mother earth".   However Burkert says that while Semele is "manifestly non-Greek", he also says that "it is no more possible to confirm that Semele is a Thraco-Phrygian word for earth than it is to prove the priority of the Lydian baki- over Bacchus as a name for Dionysos".
Seduction by Zeus and birth of Dionysus
In one version of the myth, Semele was a priestess of Zeus, and on one occasion was observed by Zeus as she slaughtered a bull at his altar and afterwards swam in the river Asopus to cleanse herself of the blood. Flying over the scene in the guise of an eagle, Zeus fell in love with Semele and afterwards repeatedly visited her secretly.
Zeus' wife, Hera, a goddess jealous of usurpers, discovered his affair with Semele when she later became pregnant. Appearing as an old crone, Hera befriended Semele, who confided in her that her lover was actually Zeus. Hera pretended not to believe her, and planted seeds of doubt in Semele's mind. Curious, Semele asked Zeus to grant her a boon. Zeus, eager to please his beloved, promised on the River Styx to grant her anything she wanted. She then demanded that Zeus reveal himself in all his glory as proof of his divinity. Though Zeus begged her not to ask this, she persisted and he was forced by his oath to comply. Zeus tried to spare her by showing her the smallest of his bolts and the sparsest thunderstorm clouds he could find. Mortals, however, cannot look upon Zeus without incinerating, and she perished, consumed in lightning-ignited flame.
Zeus rescued the fetal Dionysus, however, by sewing him into his thigh (whence the epithet Eiraphiotes, "insewn", of the Homeric Hymn). A few months later, Dionysus was born. This leads to his being called "the twice-born".
Impregnation by Zeus
There is a story in the Fabulae 167 of Gaius Julius Hyginus, or a later author whose work has been attributed to Hyginus. In this, Dionysus (called Liber) is the son of Jupiter and Proserpina, and was killed by the Titans. Jupiter gave his torn up heart in a drink to Semele, who became pregnant this way. But in another account, Zeus swallows the heart himself, in order to beget his seed on Semele. Hera then induces Semele to ask Zeus to come to her as a god, she dies, and Zeus seals the unborn baby up in his thigh. There is no suggestion in the text that Semele is a virgin, however. As a result of this Dionysus "was also called Dimetor [of two mothers] ... because the two Dionysoi were born of one father, but of two mothers" 
Still another variant of the narrative is found in Callimachus and the 5th century CE Greek writer Nonnus. In this version, the first Dionysus is called Zagreus. Nonnus does not present the conception as virginal; rather, the editor's notes say that Zeus swallowed Zagreus' heart, and visited the mortal woman Semele, whom he seduced and made pregnant. In Dionysiaca 7.110 he classifies Zeus's affair with Semele as one in a set of twelve, the other eleven women on whom he begot children being Io, Europa, the nymph Pluto, Danaë, Aigina, Antiope, Leda, Dia, Alcmene, Laodameia, mother of Sarpedon, and Olympias.
The most usual setting for the story of Semele is the palace that occupied the acropolis of Thebes, called the Cadmeia. When Pausanias visited Thebes in the 2nd century CE, he was shown the very bridal chamber where Zeus visited her and begat Dionysus. Since an Oriental inscribed cylindrical seal found at the palace can be dated 14th-13th centuries BCE, the myth of Semele must be Mycenaean or earlier in origin. At the Alcyonian Lake near the prehistoric site of Lerna, Dionysus, guided by Prosymnus or Polymnus, descended to Tartarus to free his once-mortal mother. Annual rites took place there in classical times; Pausanias refuses to describe them.
- "For some say, at Dracanum; and some, on windy Icarus; and some, in Naxos, O Heaven-born, Insewn; and others by the deep-eddying river Alpheus that pregnant Semele bare you to Zeus the thunder-lover. And others yet, lord, say you were born in Thebes; but all these lie. The Father of men and gods gave you birth remote from men and secretly from white-armed Hera. There is a certain Nysa, a mountain most high and richly grown with woods, far off in Phoenice, near the streams of Aegyptus..."
Semele was worshipped at Athens at the Lenaia, when a yearling bull, emblematic of Dionysus, was sacrificed to her. One-ninth was burnt on the altar in the Hellenic way; the rest was torn and eaten raw by the votaries.
Semele in Etruscan culture
Semele in Roman culture
In ancient Rome, a grove (lucus) near Ostia, situated between the Aventine Hill and the mouth of the Tiber River, was dedicated to a goddess named Stimula. W.H. Roscher includes the name Stimula among the indigitamenta, the lists of Roman deities maintained by priests to assure that the correct divinity was invoked in public rituals. In his poem on the Roman calendar, Ovid (d. 17 CE) identifies this goddess with Semele:
"There was a grove: known either as Semele’s or Stimula’s:
"lucus erat, dubium Semelae Stimulaene vocetur;
Augustine notes that the goddess is named after stimulae, "goads, whips," by means of which a person is driven to excessive actions. The goddess's grove was the site of the Dionysian scandal that led to official attempts to suppress the cult. The Romans viewed the Bacchanals with suspicion, based on reports of ecstatic behaviors contrary to Roman social norms and the secrecy of initiatory rite. In 186 BCE, the Roman senate took severe actions to limit the cult, without banning it. Religious beliefs and myths associated with Dionysus were successfully adapted and remained pervasive in Roman culture, as evidenced for instance by the Dionysian scenes of Roman wall painting and on sarcophagi from the 1st to the 4th centuries CE.
The Greek cult of Dionysus had flourished among the Etruscans in the archaic period, and had been made compatible with Etruscan religious beliefs. One of the main principles of the Dionysian mysteries that spread to Latium and Rome was the concept of rebirth, to which the complex myths surrounding the god's own birth were central. Birth and childhood deities were important to Roman religion; Ovid identifies Semele's sister Ino as the nurturing goddess Mater Matuta. This goddess had a major cult center at Satricum that was built 500–490 BCE. The female consort who appears with Bacchus in the acroterial statues there may be either Semele or Ariadne. The pair were part of the Aventine Triad in Rome as Liber and Libera, along with Ceres. The temple of the triad is located near the Grove of Stimula, and the grove and its shrine (sacrarium) were located outside Rome's sacred boundary (pomerium), perhaps as the "dark side" of the Aventine Triad.
Semele in the classical tradition
In the later mythological tradition of the Christian era, ancient deities and their narratives were often interpreted allegorically. In the Neoplatonic philosophy of Henry More (1614–1687), for instance, Semele was thought to embody "intellectual imagination", and was construed as the opposite of Arachne, "sense perception".
In the 18th century, the story of Semele formed the basis for three operas of the same name, the first by John Eccles (1707, to a libretto by William Congreve), another by Marin Marais (1709), and a third by George Frideric Handel (1742). Handel's work, based on Congreve's libretto but with additions, while an opera to its marrow, was originally given as an oratorio so that it could be performed in a Lenten concert series; it premiered on February 10, 1744.
- Although Dionysus is called the son of Zeus (see The cult of Dionysus : legends and practice, Dionysus, Greek god of wine & festivity, The Olympian Gods, Dictionary of Greek and Roman Biography and Mythology, The Columbia Encyclopedia, Sixth Edition, 2007, etc.), Barbara Walker, in The Woman's Encyclopedia of Myths and Secrets, (Harper/Collins, 1983) calls Semele the "Virgin Mother of Dionysus", a term that contradicts the picture given in the ancient sources: Hesiod calls him "Dionysus whom Cadmus' daughter Semele bare of union with Zeus", Euripides calls him son of Zeus, Ovid tells how his mother Semele, rather than Hera, was "to Jove's embrace preferred", Apollodorus says that "Zeus loved Semele and bedded with her".
- Martin Nillson (1967).Die Geschichte der Griechischen Religion, Vol I. C. H . Beck Verlag. Munchen p. 378
- Herodotus, Histories, II, 2.145
- Kerenyi 1976 p. 107; Seltman 1956
- Martin Nillson (1967).Die Geschichte der Griechischen Religion, Vol I. C. H . Beck Verlag. Munchen p. 568;
- /Julius Pokorny.Indogermanisches Etymologisches Woerterbuch:root *dgem.Compare Damia:"Demeter" (mother earth)
- Compare Žemyna (derived from žemė – earth), the goddess of the earth (mother goddess) in Lithuanian mythology, and Zeme, also referred to as Zemes-mãte,a Slavic and Latvian goddess of the earth :Ann, Martha and Myers Imel, Dorothy. 1993. Goddesses in World Mythology. Santa Barbara. CA: ABC-CLIO.
- Walter Burkert (1985) Greek Religion, p.163
- Nonnus, Dionysiaca 7.110-8.177 (Dalby 2005, pp. 19–27, 150)
- Or in the guise of Semele's nurse, Beroë, in Ovid's Metamorphoses III.256ff and Hyginus, Fabulae167.
- Ovid, Metamorphoses III.308–312; Hyginus, Fabulae 179; Nonnus, Dionysiaca 8.178-406
- Apollodorus, Library 3.4.3; Apollonius Rhodius, Argonautica 4.1137; Lucian, Dialogues of the Gods 9; compare the birth of Asclepius, taken from Coronis on her funeral pyre (noted by L. Preller, Theogonie und Goetter, vol I of Griechische Mythologie 1894:661).
- Hyginus, Astronomy 2.5; Arnobius, Against the Gentiles 5.28 (Dalby 2005, pp. 108–117)
- Nonnus, Dionysiaca 8.407-418
- Fabulae 167.1
- (Diodorus Siculus, Library of History 4. 4. 5, quoted in the Theoi.com collection of Zagreus sources])
- Callimachus, Fragments, in the etymol. ζαγρεὺς, Zagreos; see Karl Otfried Müller, John Leitch, Introduction to a Scientific System of Mythology (1844), p.319, n.5
- Nonnus, Dionysiaca 24. 43 ff — translation in Zagreus
- Nonnus, Dionysiaca 7.110
- Semele was "made into a woman by the Thebans and called the daughter of Kadmos, thoughh her original character as an earth-goddess is transparently evident" according to William Keith Chambers Guthrie, Orpheus and Greek Religion, rev. ed. 1953:56. Robert Graves is characteristically speculative: the story "seems to record the summary action taken by Hellenes of Boeotia in ending the tradition of royal sacrifice: Olympian Zeus asserts his power, takes the doomed king under his own protection, and destroys the goddess with her own thunderbolt." (Graves 1960:§14.5). The connection Semele=Selene is often noted, nevertheless.
- Kerenyi 1976 p 193 and note 13
- Pausanias, Description of Greece 2.37; Plutarch, Isis and Osiris 35 (Dalby 2005, p. 135)
- Graves 1960, 14.c.5
- Timothy Gantz, "Divine Guilt in Aischylos" The Classical Quarterly New Series, 31.1 (1981:18-32) p 25f.
- CIL 6.9897; R. Joy Littlewood, A Commentary on Ovid's Fasti, Book 6 (Oxford University Press, 2006), p. 159.
- W.H. Roscher, Ausführliches Lexikon der griechischen und römischen Mythologie (Leipzig: Teubner, 1890–94), vol. 2, pt. 1, pp. 226–227.
- Ovid, Fasti , 6.503ff.
- Augustine, De Civitate Dei 4.11.
- Described by Livy, Ab Urbe Condita 39.12.
- Littlewood, A Commentary on Ovid, p. xliv. See particularly the paintings of the Villa of the Mysteries.
- Littlewood, A Commentary on Ovid, p. xliv.
- Michael Lipka, Roman Gods: A Conceptual Approach (Brill, 2009), pp. 18–19.
- Henry Moore, A Platonick Song of the Soul (1647), as discussed by Alexander Jacob, "The Neoplatonic Conception of Nature," in The Uses of Antiquity: The Scientific Revolution and the Classical Tradition (Kluwer, 1991), pp. 103–104.
- Dean, Winton (1959). Handel's dramatic oratorios and masques. London: Oxford University Press. p. 365. ISBN 0-19-315203-7.
- Burkert, Walter (1985), Greek Religion, Cambridge, Mass.: Harvard University Press, ISBN 0-674-36280-2
- Dalby, Andrew (2005), The Story of Bacchus, London: British Museum Press, ISBN 0-7141-2255-6 (US ISBN 0-89236-742-3)
- Graves, Robert, 1960. The Greek Myths
- Kerenyi, Carl, 1976. Dionysus: Archetypal Image of the Indestructible Life, (Bollingen, Princeton)
- Kerenyi, Carl, 1951. The Gods of the Greeks pp. 256ff.
- Seltman, Charles, 1956. The Twelve Olympians and their Guests. Shenval Press Ltd.
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