Freeing Prometheus from his torment was the invincible Heracles (Hercules). Son of a mortal woman, Alcmene, and Zeus who wanted a valiant son to defeat the Giants in war, Heracles was very valiant, strong, courageous and generous, but also very irrational and violent. Persecuted by Hera, notwithstanding his great valiance, he wandered the earth having many adventures, but never succeeded to conquer a kingdom and often was placed in the service of mortals. He was depicted as a muscular man, wearing the hide of the first lion he killed, and he carried a club.
