Pandora was the first woman, created by Hephaestus
and Athena, with the help of other gods and under
general instructions of Zeus. Each god and goddess presented her with special
qualities - beauty, grace, etc. Hephaestus' gave her qualities of constant
lying and deceit. She was designed to bring men misfortune as a punishment
for having received divine fire from Prometheus.
She also held a box (or a pot) with all world's evils. By opening it carelessly
she let all the evils out.
See: Dante Gabriel Rossetti Pandora.