Both are primordial mothers who turn against the younger gods
At a glance
Greek Pantheon
tradition
Mesopotamian Pantheon
the earth, primordial creation, motherhood of the Titans and Giants
domains
primordial waters, salt sea, chaos, creation
the earth itself, cornucopia (later art), serpents (in Gigantomachy imagery)
symbols
dragon, salt water, eleven monsters
Ge, Gaea, Tellus (Roman)
also called
Tamtu, Thalassa
Where they meet
The atlas records no shared domain or symbol between them. What connects them is elsewhere: Both are primordial mothers who turn against the younger gods
Where they part
Gaia alone
the earth, primordial creation, motherhood of the Titans and Giants
Tiamat alone
primordial waters, salt sea, chaos, creation
Why they are compared
Both are primordial mothers who turn against the younger gods
Tiamat already lists Gaia; both are primordial mothers of the first gods who later turn against a younger generation
How each was worshipped
Gaia
Cult sites: Shared sanctuary traditions at early Delphi (pre-Apolline oracle, per later Greek tradition), Altars at Athens and Olympia.
Festivals: Invoked in solemn oaths alongside Uranus and the underworld rivers.
Gaia's cult was diffuse rather than centered on grand temples: oaths, first-fruits offerings to the earth, and the tradition — reported by later Greek writers, not universally accepted by modern scholars — that Delphi's oracle originally belonged to her before passing to Themis and then Apollo.
Tiamat
Cult sites: No attested temple in the surviving record.
Festivals: Enuma Elish recited at Akitu — about her death, not to her.
Primordial sea, cut up to make the world. Babylon's New Year recites her defeat. That is not a petitioning cult.
Gaia
Greek Pantheon
Primordial goddess of the Earth, one of the first beings to emerge from Chaos. Gaia is the mother of the sky (Uranus), the sea (Pontus), the Titans, the Cyclopes, and, through the blood of Uranus, the Giants and the Furies.
Gaia emerged directly after Chaos as one of the first primordial beings. She alone brought forth Uranus (the Sky) and Pontus (the Sea), then united with Uranus to bear the Titans, Cyclopes, and Hecatoncheires, becoming the ancestral mother of nearly every subsequent generation of gods.
In Hesiod's *Theogony*, Gaia is among the very first entities to exist, arising after Chaos as "the ever-sure foundation of all." From herself alone she bore Uranus, the starry Sky, to cover her on every side, and Pontus, the sea. She then united with Uranus to bear the twelve Titans, the three one-eyed Cyclopes, and the three monstrous Hundred-Handed Ones (Hecatoncheires).
The primordial goddess of the salt sea and chaos dragon. Tiamat is the mother of the first gods and, after being slain by Marduk, became the raw material from which the universe was fashioned.
In the beginning, there was only salt water (Tiamat) and sweet water (Apsu), mingling together in the primordial void. From their union emerged the first gods. When the younger gods grew noisy, Apsu sought to destroy them but was killed by Ea. Tiamat mourned but was eventually persuaded to avenge him, transforming into a chaos dragon and creating an army of monsters.
Tiamat represents the salt water of the primeval ocean, complementing her consort Apsu who embodied fresh water. Their mingling produced the first generation of gods. She is both creative and destructive, nurturing mother and terrifying dragon, embodying the ambivalent power of the primordial chaos from which order emerged.