Athena comes by her birth unusually in Greek mythology. Among the stories of ancient Greece is one, told by Hesiod and others, that says Zeus had an awful headache. In order to ease the pain, he asked Hephaestus to hit him over the head with a blacksmith's hammer.
And so unexpectedly, Athena sprang fully armed from the forehead of Zeus, much to everyone's amazement. This episode is highly symbolial, demonstrating Athena's wisdom, military tactics and savage heroism, all gifts from her father, Zeus.