According to the Greek mythology, Prometheus was one of the Titans. Prometheus stolen the ‘good’ of fire and the knowledge of the twelve gods of Olympus and gave them to humans. Zeus punished him nailing him on the Mount of Caucasus, where an eagle was eating his liver during the day. During the night the liver grew again. The punishment continued for a thousand years, until Hercules liberated him. The work is made with a single oak trunk.