Athena's symbols, as shown commonly in depictions of the goddess, include:
- her sacred animal, the well-known owl -- seen on Athenian coins,
- the aegis cloak with the head of Medusa,
- a round shield,
- and a helmet -- carried in her hand if not on her head.
- the cock,
- a lance,
- the olive, and
- a serpent.
Source: Dictionary of Greek and Roman Biography and Mythology via Theoi - Athena