The Gigantes (Greek Γίγαντες, "Giants") were a race of great strength and aggressive arrogance born from Gaia (Earth). They are best known for the Gigantomachy, their cataclysmic war against the Olympian gods, which Greek tradition treated as the triumph of divine order over chaotic earthborn forces. A prophecy held that the Giants could not be slain by the gods alone but only with the aid of a mortal, which made the hero Heracles essential to the gods' victory. Despite their name, in early sources the Giants were not necessarily enormous in size; their defining traits were martial power and impiety rather than gigantic stature.
Adapted from Wikipedia, "Giants (Greek mythology)" · CC BY-SA 4.0
I.Family and Origin
According to Hesiod's Theogony, the Giants were offspring of Gaia (Earth), born from the drops of blood that fell upon her when Uranus (Sky) was castrated by his Titan son Cronus. They emerged already "with gleaming armour, holding long spears in their hands," an image suggesting that they were born ready for warfare.
Apollodorus offers an alternative account, in which Gaia produces the Giants out of anger over the imprisonment of the Titans by the Olympians, without explicit reference to the castration of Uranus. Across these versions the Giants remain consistently chthonic, sprung directly from the earth rather than from a divine union.
II.The Gigantomachy
The Gigantomachy, the battle between the Giants and the Olympian gods, is one of the most significant divine conflicts in Greek mythology. A crucial prophecy held that the Giants could not be killed by the gods alone but could be killed with the help of a mortal, which made the participation of the hero Heracles essential. To deny the Giants a protective plant that Gaia sought for them, Zeus forbade Eos, Selene, and Helios to shine and harvested it himself.
Heracles proved decisive in the battle: he killed Alcyoneus by dragging him beyond his native land, where the Giant was otherwise immortal, and he helped finish Porphyrion after Zeus struck the Giant with a thunderbolt. The other gods contributed as well — Athena crushed Enceladus beneath Sicily, Poseidon broke off the island of Nisyros and hurled it upon Polybotes, and Dionysus killed Eurytus with his thyrsus. The war is presented as a victory of Olympian order over the chaotic, impious forces of the earth.
III.Notable Individual Giants
Alcyoneus and Porphyrion were reckoned the two strongest of the Giants. Alcyoneus was immortal within his homeland, so Heracles had to drag him beyond its borders before he could be killed; Porphyrion attacked Heracles and Hera but was defeated when Zeus struck him with a thunderbolt and Heracles shot him with an arrow.
Other prominent Giants include Enceladus, who fought Athena and was buried beneath Sicily, his movements later blamed for volcanic eruptions; Ephialtes, blinded by arrows from both Apollo and Heracles, one in each eye; and Polybotes, crushed beneath the island of Nisyros. Many further Giants are named in ancient inscriptions and literary sources, among them Clytius, Mimas, and Pallas.
IV.Iconography and Artistic Representation
The Gigantomachy was among the most frequently depicted subjects in Greek art, with more than six hundred representations catalogued. In Archaic and Classical art of the sixth and fifth centuries BCE, the Giants were shown as man-sized hoplites in fully human form, armed like Greek warriors. From around the fourth century BCE a new convention emerged in which Giants were given serpent legs in place of human feet, imagery borrowed from depictions of Typhon.
The monumental frieze of the Pergamon Altar (second century BCE) represents the culmination of this tradition, with over a hundred figures rendered in extraordinary detail; in such later works some Giants kept human form while others displayed wings, animal heads, or serpentine features. The Gigantomachy also adorned major architectural projects, including the metopes of the Parthenon and the Siphnian Treasury at Delphi, where it symbolized civic and divine order triumphing over chaos and barbarism.