Athena was the Greek virgin goddess of reason, intelligent activity, arts and literature. She was the daughter of Zeus; her birth is unique in that she did not have a mother. Instead, she sprang full grown and clad in armour from Zeus' forehead.
She was fierce and brave in battle; however, she only took part in wars that defended the state and home from outside enemies. She was the patron of the city, handcraft, and agriculture. She invented the bridle, which permitted man to tame horses, the trumpet, the flute, the pot, the rake, the plow, the yoke, the ship, and the chariot. She was the embodiment of wisdom, reason, and purity. She was Zeus' favourite child and was allowed to use his weapons including his thunderbolt. Her holy tree was the olive tree and she was often symbolised as an owl.
She became the patron goddess of Athens after winning a contest against Poseidon by offering the olive tree to the Athenians. It is evident that Athena and Athens derive from the same root; Athens (or Athenae) is in plural form, because it represents the sisterhood of the goddess that existed there. Similarly, Athena was called Mykene in the city of Mycenae (also a plural after the respective sisterhood), and Thebe in the city of Thebes (or Thebae, both plural forms).

Zeus came to lust after Metis, and chased her in his direct way. Metis tried to escape, going so far as to change her form many times; she changed into various creatures such as hawks, fish, and serpents. However, Zeus was both determined and equally proficient at changing form. He continued his pursuit until she relented.
An oracle of Gaea then prophesied that Metis' first child would be a girl and that her second child would be a boy that would overthrow Zeus, similarly to what had happened to his father and grandfather. Zeus took this warning to heart. When he next saw Metis, he initially flattered her and put her at her ease. Then, with Metis' guards down, Zeus opened his mouth and swallowed her and her unborn child. This was the end of Metis, but also the beginning of Zeus' wisdom.
After a time, Zeus developed an unbearable headache, which made him scream out of pain so loudly it could be heard throughout the earth. The other gods came to see what the problem was. Hermes realized what needed to be done and directed Hephaestus to take a wedge and split open Zeus's skull. Out of the skull sprang Athena, fully grown and in a full set of armour. Due to the way of her birth, she became the goddess of intelligence and wisdom.
See Also: Zeus, Poseidon, Theogony
Athena Is also called Minerva, Athina, Athene.