- Argus

Argus was a giant with 100 eyes. Argus (or Argos) was a monster. With his multiple sets of eyes, there seems to be no way of escaping him, for even when he slept, fifty of his eyes remain open and look around threateningly. Hera, the Queen of the Olympian gods and goddesses, commanded Argus to watch over Io. Io was a woman with whom Zeus - the ruler of the Olympians - had conducted a passionate love affair. However, in order to protect his mistress from the wrath of his wife, Zeus had transformed Io into a heifer. Hera asked Argus to guard her rival Io. Zeus sent the god Hermes to dispatch the monster. Hermes lulled Argus to sleep before killing him. After his death, Hera set his eyes in tail of the peacock, which became her symbol.