In Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

, Leda (Λήδα) was daughter of the Aetolia

Aetolia

Aetolia is a mountainous region of Greece on the north coast of the Gulf of Corinth, forming the eastern part of the modern prefecture of Aetolia-Acarnania.-Geography:...

n king Thestius

Thestius

In Greek mythology, Thestius was the son of either Ares and Demonice, or Agenor and Epicasta. He was the father of Iphicles with Leucippe, or Deidameia, daughter of Perieres, or else with Eurythemis, daughter of Cleoboea and mother of his other children, Althaea, Eurypylus, Evippus, Hypermnestra,...

, and wife of the king Tyndareus

Tyndareus

In Greek mythology, Tyndareus or Tyndareos was a Spartan king, son of Oebalus and Gorgophone , husband of Leda and father of Helen, Castor and Polydeuces, Clytemnestra, Timandra, Phoebe and Philonoe.Tyndareus had a brother named Hippocoon , who seized power and exiled Tyndareus...

 (Τυνδάρεως), of Sparta

Sparta

Sparta or Lacedaemon, was a prominent city-state in ancient Greece, situated on the banks of the River Eurotas in Laconia, in south-eastern Peloponnese. It emerged as a political entity around the 10th century BC, when the invading Dorians subjugated the local, non-Dorian population. From c...

. Her myth gave rise to the popular motif in Renaissance and later art of Leda and the Swan

Leda and the Swan

Leda and the Swan is a motif from Greek mythology in which Zeus came to Leda in the form of a swan. According to later Greek mythology, Leda bore Helen and Polydeuces, children of Zeus, while at the same time bearing Castor and Clytemnestra, children of her husband Tyndareus, the King of Sparta. In...

. She was the mother of Helen (Ἑλένη) of Troy, Clytemnestra

Clytemnestra

Clytemnestra or Clytaemnestra , in ancient Greek legend, was the wife of Agamemnon, king of the Ancient Greek kingdom of Mycenae or Argos. In the Oresteia by Aeschylus, she was a femme fatale who murdered her husband, Agamemnon – said by Euripides to be her second husband – and the Trojan princess...

 (Κλυταιμνήστρα), and Castor and Pollux

Castor and Pollux

In Greek and Roman mythology, Castor and Pollux or Polydeuces were twin brothers, together known as the Dioscuri . Their mother was Leda, but Castor was the mortal son of Tyndareus, king of Sparta, and Pollux the divine son of Zeus, who visited Leda in the guise of a swan...

 (Κάστωρ καὶ Πολυδεύκης, also spelled Kastor and Polydeuces).

Leda was admired by Zeus

Zeus

In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

, who seduced her in the guise of a swan

Swan

Swans, genus Cygnus, are birds of the family Anatidae, which also includes geese and ducks. Swans are grouped with the closely related geese in the subfamily Anserinae where they form the tribe Cygnini. Sometimes, they are considered a distinct subfamily, Cygninae...

. As a swan, Zeus fell into her arms for protection from a pursuing eagle. Their consummation, on the same night as Leda lay with her husband Tyndareus, resulted in two eggs from which hatched Helen (later known as the beautiful "Helen of Troy"), Clytemnestra, and Castor and Pollux (also known as the Dioscuri (Διόσκουροι). Which children are the progeny of Tyndareus, the mortal king, and which are of Zeus, and are thus half-immortal, is not consistent among accounts, nor is which child hatched from which egg. The split is almost always half mortal, half divine, although the pairings do not always reflect the children's heritage pairings. Castor and Polydeuces are sometimes both mortal, sometimes both divine. One consistent point is that if only one of them is immortal, it is Polydeuces. It is also always stated that Helen is the daughter of Zeus.

Leda also had other daughters by Tyndareus: Timandra

Timandra (mythology)

In Greek mythology, Timandra was one of the daughters of Leda and Tyndareus. Timandra married Echemus, the king of Arcadia, and with him had a son named Ladocus. Like her sisters Helen and Clytemnestra, she was also unfaithful and deserted Echemus for Phyleus, the king of...

 (Τιμάνδρα), Phoebe

Phoebe (mythology)

In Greek mythology "radiant" Phoebe , was one of the original Titans, who were one set of sons and daughters of Uranus and Gaia. She was traditionally associated with the moon , as in Michael Drayton's Endimion and Phœbe, , the first extended treatment of the Endymion myth in English...

 (Φοίβη), and Philonoe

Philonoe

In Greek mythology, there were two women known as Philonoe or Phylonoe :#Daughter of King Tyndareus of Sparta and Leda. Artemis made her immortal....

 (Φιλονόη).

In Homer's Iliad

Iliad

The Iliad is an epic poem in dactylic hexameters, traditionally attributed to Homer. Set during the Trojan War, the ten-year siege of the city of Troy by a coalition of Greek states, it tells of the battles and events during the weeks of a quarrel between King Agamemnon and the warrior Achilles...

, Helen looks down from the walls of Troy and wonders why she does not see her brothers among the Achaeans. The narrator remarks that they are both already dead and buried back in their homeland of Lacedaemon, thus suggesting that at least in some early traditions, both were mortal.

Another account of the myth states that Nemesis

Nemesis (mythology)

In Greek mythology, Nemesis , also called Rhamnousia/Rhamnusia at her sanctuary at Rhamnous, north of Marathon, was the spirit of divine retribution against those who succumb to hubris . The Greeks personified vengeful fate as a remorseless goddess: the goddess of revenge...

 (Νέμεσις) was the mother of Helen, and was also impregnated by Zeus in the guise of a swan. A shepherd found the egg and gave it to Leda, who carefully kept it in a chest until the egg hatched. When the egg hatched, Leda adopted Helen as her daughter. Zeus also commemorated the birth of Helen by creating the constellation Cygnus

Cygnus (constellation)

Cygnus is a northern constellation lying on the plane of the Milky Way. Its name is the Latinized Hellenic word for swan. One of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross...

 (Κύκνος), the Swan, in the sky.

Leda and the swan and Leda and the egg were popular subjects in the ancient art. In the post-classical arts, it became a potent source of inspiration.

See also Leda and the Swan

Leda and the Swan

Leda and the Swan is a motif from Greek mythology in which Zeus came to Leda in the form of a swan. According to later Greek mythology, Leda bore Helen and Polydeuces, children of Zeus, while at the same time bearing Castor and Clytemnestra, children of her husband Tyndareus, the King of Sparta. In...

 for the motif in the visual arts and the poem by William Butler Yeats

William Butler Yeats

William Butler Yeats was an Irish poet and playwright, and one of the foremost figures of 20th century literature. A pillar of both the Irish and British literary establishments, in his later years he served as an Irish Senator for two terms...

.