In Ancient Greek religion and mythology, Cronus, Cronos, or Kronos (ˈkroʊnəs or ˈkroʊnɒs, from Κρόνος, Krónos) was the leader and youngest of the first generation of Titans, the divine descendants of the primordial Gaia (Mother Earth) and Uranus (Father Sky). He overthrew his father and ruled during the mythological Golden Age, until he was overthrown by his own son Zeus and imprisoned in Tartarus. According to Plato, however, the deities Phorcys, Cronus, and Rhea were the eldest children of Oceanus and Tethys.
Cronus was usually depicted with a harpe, scythe or a sickle, which was the instrument he used to castrate and depose Uranus, his father. In Athens, on the twelfth day of the Attic month of Hekatombaion, a festival called Kronia was held in honour of Cronus to celebrate the harvest, suggesting that, as a result of his association with the virtuous Golden Age, Cronus continued to preside as a patron of the harvest. Cronus was also identified in classical antiquity with the Roman deity Saturn.
In an ancient myth recorded by Hesiod's Theogony, Cronus envied the power of his father, Uranus, the ruler of the universe. Uranus drew the enmity of Cronus's mother, Gaia, when he hid the gigantic youngest children of Gaia, the hundred-handed Hecatoncheires and one-eyed Cyclopes, in Tartarus, so that they would not see the light. Gaia created a great stone sickle and gathered together Cronus and his brothers to persuade them to castrate Uranus.
Only Cronus was willing to do the deed, so Gaia gave him the sickle and placed him in ambush. When Uranus met with Gaia, Cronus attacked him with the sickle, castrating him and casting his testicles into the sea. From the blood that spilled out from Uranus and fell upon the earth, the Gigantes, Erinyes, and Meliae were produced. The testicles produced a white foam from which the goddess Aphrodite emerged. For this, Uranus threatened vengeance and called his sons Titenes for overstepping their boundaries and daring to commit such an act.