he Twelve Labours of Heracles or Hercules are a series of episodes concerning a penance carried out by Heracles, the greatest of the Greek heroes, whose name was later romanised as Hercules. They were accomplished over 12 years at the service of King Eurystheus. The episodes were later connected by a continuous narrative. The establishment of a fixed cycle of twelve labours was attributed by the Greeks to an epic poem, now lost, written by Peisander, dated about 600 BC. After Hercules killed his wife and children, he went to the oracle at Delphi. He prayed to the god Apollo for guidance. Hercules was told to serve the king of Mycenae, Eurystheus, for 12 years. During these 12 years, Hercules is sent to perform twelve difficult feats, called labours.